Fix a double '\n' in logging.

    * ImaLogCPP/src/Logger.cpp: Here.
Start viewer with a simple parser.

This is a first draft for the first step of the viewer: the parser.
Error are mostly not handled, and as for now, it will only work on
clean entries. Next step is to display the logs in a GUI.

      * CMakeLists.txt: added subdir ImaLogViewer.
      * ImaLogViewer/CMakeLists.txt: New.
      * ImaLogViewer/src/Date.hpp: New. Class that stores a date.
      * ImaLogViewer/src/Date.cpp: New.
      * ImaLogViewer/src/Log.hpp: New. Class that stores a log.
      * ImaLogViewer/src/Log.cpp: New.
      * ImaLogViewer/src/Parser.hpp: New. The parser. Not
        finished.
      * ImaLogViewer/src/Parser.cpp: New.
      * ImaLogViewer/src/main.cpp: New. A simple test.