Clean up .gitignore
Clean up .gitignore

Having cmake build files ignored by git is a pain when you mistakenly
run "cmake ." from the source directory.  If you *really* want to build
in-source, use .git/info/exclude to ignore files, not a .gitignore.


Former-commit-id: 962e89c4dd1a420160368e85c1d07769ada00a77
Anatoscope/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,hdeling/sofa,FabienPean/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa,FabienPean/sofa,Anatoscope/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa