Add linux support (just change the library paths)

-Change QtMapBuilder.pro to include linux libraries
-Tested using lua 5.1 and ubuntu 13.04 luabind from apt-get
-Qscintilla compiled using qmake from Qt 5.2(note, it might not be the
default qmake)

Signed-off-by: Gustavo Jaruga <darksshades@gmail.com>