update .gitignore

ignore eclipse and CDT project files and metadata
ignore C++ compiled object files
Merge pull request #1 from P4/master

update .gitignore
directory cleanup according to gitignore

untrack .cproject
untrack .project
untrack *.o files
Game::startGame: get rid of ternary operator
Merge remote-tracking branch 'origin/master'

Conflicts:
	.cproject
	Game.cpp