Did some clean-up on the boost_logger class and finished up the development
of the logging implemenation for the time being.

Down the road, I will probably want to include the thread id, but I kept
a start on that in comments in the boost_logger class.

. deleted:    src/collector_main.cpp
  . renamed to ... src/packet-collector.cpp

. new file:   src/packet-collector.cpp

. modified:   Makefile
  . Added boost_logger.cpp to the deps of the collector.o target.
  . Renamed instances of collector_main.o -> packet-collector.o:

. modified:   include/boost_logger.hpp
  . Started adding comments.
  . Added a CLASS_NAME macro to be included in the logging messages.
  . Added typdefs:
    . typedefboost::log::sinks::synchronous_sink<boost::log::sinks::text_ostream_backend> sink_sync_txt_ostream_t;
    . typedef boost::log::sinks::synchronous_sink<boost::log::sinks::text_file_backend> sink_sync_txt_file_t;
  . Added new members:
    . sink_sync_txt_ostream_t* sink_sync_txt_ostream;
    . sink_sync_txt_file_t* sink_sync_txt_file;

. modified:   include/collector.hpp
  . Added a CLASS_NAME macro to be included in the logging messages.

. modified:   src/boost_logger.cpp
  . Refactored the init method to use the new pointer members added in the
    include/boost_logger.hpp header.

. modified:   src/collector.cpp
  . Updated logging calls to incorporate the CLASS_NAME macro.