src: Updating code style to conform (more or less) to ndn-cxx style

Also, adding .clang-format that describes the applied style. Note that
this style requires a slightly customized version of clang-format.
diff --git a/model/cs/custom-policies/lifetime-stats-policy.hpp b/model/cs/custom-policies/lifetime-stats-policy.hpp
index 905f532..1102ef1 100644
--- a/model/cs/custom-policies/lifetime-stats-policy.hpp
+++ b/model/cs/custom-policies/lifetime-stats-policy.hpp
@@ -35,119 +35,122 @@
 /**
  * @brief Traits for lifetime stats policy
  */
-struct lifetime_stats_policy_traits
-{
+struct lifetime_stats_policy_traits {
   /// @brief Name that can be used to identify the policy (for NS-3 object model and logging)
-  static std::string GetName () { return "LifetimeStats"; }
-
-  struct policy_hook_type : public boost::intrusive::list_member_hook<> { Time timeWhenAdded; };
-
-  template<class Container>
-  struct container_hook
+  static std::string
+  GetName()
   {
-    typedef boost::intrusive::member_hook< Container,
-                                           policy_hook_type,
-                                           &Container::policy_hook_ > type;
+    return "LifetimeStats";
+  }
+
+  struct policy_hook_type : public boost::intrusive::list_member_hook<> {
+    Time timeWhenAdded;
   };
 
-  template<class Base,
-           class Container,
-           class Hook>
-  struct policy 
-  {
-    typedef typename boost::intrusive::list< Container, Hook > policy_container;
-    
-    static Time& get_time (typename Container::iterator item)
+  template<class Container>
+  struct container_hook {
+    typedef boost::intrusive::member_hook<Container, policy_hook_type, &Container::policy_hook_>
+      type;
+  };
+
+  template<class Base, class Container, class Hook>
+  struct policy {
+    typedef typename boost::intrusive::list<Container, Hook> policy_container;
+
+    static Time&
+    get_time(typename Container::iterator item)
     {
-      return static_cast<typename policy_container::value_traits::hook_type*>
-        (policy_container::value_traits::to_node_ptr(*item))->timeWhenAdded;
-    }
-      
-    static const Time& get_time (typename Container::const_iterator item)
-    {
-      return static_cast<const typename policy_container::value_traits::hook_type*>
-        (policy_container::value_traits::to_node_ptr(*item))->timeWhenAdded;
+      return static_cast<typename policy_container::value_traits::hook_type*>(
+               policy_container::value_traits::to_node_ptr(*item))->timeWhenAdded;
     }
 
-    class type : public policy_container
+    static const Time&
+    get_time(typename Container::const_iterator item)
     {
+      return static_cast<const typename policy_container::value_traits::hook_type*>(
+               policy_container::value_traits::to_node_ptr(*item))->timeWhenAdded;
+    }
+
+    class type : public policy_container {
     public:
       typedef policy policy_base; // to get access to get_time methods from outside
       typedef Container parent_trie;
 
-      type (Base &base)
-        : base_ (base)
-        , max_size_ (100)
-        , m_willRemoveEntry (0)
+      type(Base& base)
+        : base_(base)
+        , max_size_(100)
+        , m_willRemoveEntry(0)
       {
       }
 
       inline void
-      update (typename parent_trie::iterator item)
+      update(typename parent_trie::iterator item)
       {
         // do nothing. it's random policy
       }
-  
-      inline bool
-      insert (typename parent_trie::iterator item)
-      {
-        get_time (item) = Simulator::Now ();
 
-        policy_container::push_back (*item);
+      inline bool
+      insert(typename parent_trie::iterator item)
+      {
+        get_time(item) = Simulator::Now();
+
+        policy_container::push_back(*item);
         return true;
       }
-  
+
       inline void
-      lookup (typename parent_trie::iterator item)
+      lookup(typename parent_trie::iterator item)
       {
         // do nothing. it's random policy
       }
-  
-      inline void
-      erase (typename parent_trie::iterator item)
-      {
-        Time lifetime = Simulator::Now () - get_time (item);
 
-        if (m_willRemoveEntry != 0)
-          {
-            (*m_willRemoveEntry) (item->payload (), lifetime);
-          }
-        
-        policy_container::erase (policy_container::s_iterator_to (*item));
+      inline void
+      erase(typename parent_trie::iterator item)
+      {
+        Time lifetime = Simulator::Now() - get_time(item);
+
+        if (m_willRemoveEntry != 0) {
+          (*m_willRemoveEntry)(item->payload(), lifetime);
+        }
+
+        policy_container::erase(policy_container::s_iterator_to(*item));
       }
 
       inline void
-      clear ()
+      clear()
       {
-        policy_container::clear ();
+        policy_container::clear();
       }
 
       inline void
-      set_max_size (size_t max_size)
+      set_max_size(size_t max_size)
       {
         max_size_ = max_size;
       }
 
       inline size_t
-      get_max_size () const
+      get_max_size() const
       {
         return max_size_;
       }
 
       void
-      set_traced_callback (TracedCallback< typename parent_trie::payload_traits::const_base_type, Time > *callback)
+      set_traced_callback(
+        TracedCallback<typename parent_trie::payload_traits::const_base_type, Time>* callback)
       {
         m_willRemoveEntry = callback;
       }
-      
+
     private:
-      type () : base_(*((Base*)0)) { };
-      
+      type()
+        : base_(*((Base*)0)){};
+
     private:
-      Base &base_;
+      Base& base_;
       size_t max_size_;
 
-      TracedCallback< typename parent_trie::payload_traits::const_base_type, Time > *m_willRemoveEntry;
+      TracedCallback<typename parent_trie::payload_traits::const_base_type, Time>*
+        m_willRemoveEntry;
     };
   };
 };