Support for boost added.

The following pattern should be observed:
1) A dependencies folder has been added. All 3rd party libraries
   should be added to this folder.

2) A test project that confirms that the library compiles
   should be added in the Tests folder.

3) The path to the new dependency should be added to the
   SiegeOfDamodred.prop property sheet.

Two files could not be committed due to their size. A future commit
that will allow us to build these libs from SoD is planned.

1) dependencies\boost_1_55_0\bin.v2\libs\log\build\msvc-11.0\debug\
   link-static\log-api-winnt\threading-multi\
   libboost_log_setup-vc110-mt-gd-1_55.lib
2) dependencies\boost_1_55_0\stage\lib\
   libboost_log_setup-vc110-mt-gd-1_55.lib