exceptions: Make Tlv::Error a base class for all packet-processing exceptions

This commit also includes a number of code style fixes.

Change-Id: I44f83915e733b43d5f43b4266902c8262e928d91
Refs: #1528
diff --git a/src/meta-info.hpp b/src/meta-info.hpp
index 4153911..03600cf 100644
--- a/src/meta-info.hpp
+++ b/src/meta-info.hpp
@@ -14,7 +14,8 @@
 /**
  * An MetaInfo holds the meta info which is signed inside the data packet.
  */
-class MetaInfo {
+class MetaInfo
+{
 public:
   enum {
     TYPE_DEFAULT = 0,