Add gitignore file
Add gitignore file
ruby-concurrency/rake-compiler-dev-box,flavorjones/rake-compiler-dev-box,tjschuck/rake-compiler-dev-box,flavorjones/rake-compiler-dev-box,copiousfreetime/rake-compiler-dev-box,ruby-concurrency/rake-compiler-dev-box,tjschuck/rake-compiler-dev-box,copiousfreetime/rake-compiler-dev-box,tjschuck/rake-compiler-dev-box,copiousfreetime/rake-compiler-dev-box,flavorjones/rake-compiler-dev-box,copiousfreetime/rake-compiler-dev-box,ruby-concurrency/rake-compiler-dev-box,ruby-concurrency/rake-compiler-dev-box,tjschuck/rake-compiler-dev-box,flavorjones/rake-compiler-dev-box