Add initial Lemur Toolkit v4.12 files
Lemur Toolkit 4.12

Untouched Lemur Toolkit v4.12 source files from
the Lemur Project

Source from:
http://sourceforge.net/projects/lemur/files/lemur/lemur-toolkit-4.12/

http://www.lemurproject.org/
Fix initial compilation errors

utility/include/CSet.hpp
utility/include/ISet.hpp

Both had scope errors
    `this->` additions fixed
Add initial version of Lemur .gitignore

depend/       - compiled object dependencies
obj/          - compiled object directories
*.app         - app/compiled/generated files
*.log         - generated log files
*.o           - compiled object files
config.status - configure script generated
MakeDefns     - generated Makefile definitions