link boost when the boost variable is set
use glfw3 libs instead of manually linking OpenGL frameworks on OS X
[skip ci]
fix compile warnings
install boost on osx
silence warning; GCC needs this parameter, but Clang says its unused
make gyp generate newer project files

patch from https://groups.google.com/forum/#!msg/gyp-developer/0JiSNtsKc30/xYxQFqRfrTcJ
fix more xcode upgrade warnings
write to correct file and add to gitignore
use correct configuration file
fix compile warnings in libtess2
don't pass on boost path; it's unneeded