Revert "Merge remote-tracking branch 'origin/master' into aschaeffer/particles"

This reverts commit 82c6fc022dee3f80faeb1d873612c211575a5dcf, reversing
changes made to 77fe688ad773b4d85ce937ff434236e46fabd99c.
Revert "Ignore eclipse CDT project file"

This reverts commit a38100f34d324967b1333e390b3f000ea944eb28.
Revert "Ignore debug folder"

This reverts commit 01a7bcbfb5f0ad4acff95174b4262cb72535a795.
Git ignore eclipse CDT project file and eclipse debug folder
Merge remote-tracking branch 'origin/master' into aschaeffer/particles