adding gitignore
Just a suggestion i found [here](http://stackoverflow.com/questions/12558327/google-test-in-visual-studio-2012)
Basically VS2012 does not support variadic templates. If you try building as is you will receive a bunch of C2977 errors regarding std::tuple.
Gtest goes above the max vs2012 will support by default, this ups the limit to 10.
Merge remote-tracking branch 'origin/master'