src: configuration file parsing

used boost::property_tree::info_parser for parsing nlsr's configuration file and
changed configuration command style to info command style. Removed tokenizer from
nlsr

Refs: #1542

Change-Id: If017ddd7eef5caa59b33940bfc27a71aa4de266b
diff --git a/wscript b/wscript
index 146b5e8..909a2df 100644
--- a/wscript
+++ b/wscript
@@ -46,7 +46,7 @@
     conf.check_cfg(package='libndn-cxx', args=['--cflags', '--libs'],
                    uselib_store='NDN_CPP', mandatory=True)
 
-    boost_libs = 'system chrono program_options iostreams thread'
+    boost_libs = 'system chrono program_options iostreams thread regex'
     if conf.options.with_tests:
         conf.env['WITH_TESTS'] = 1
         conf.define('WITH_TESTS', 1);