fixed make clean
knife.rb reference is missing http_proxy authentication directives
Added documentation for keep_releases attribute which was missing from the deploy resource pages
Merge pull request #59 from juliandunn/missing-keep-releases

Added documentation for keep_releases attribute
slight edit
Merge pull request #58 from juliandunn/missing-http-proxy-auth

knife.rb reference is missing http_proxy authentication directives
Merge pull request #23 from eMomTeam/make_clean

fixed make clean
add yard-chef to development tools for community pages
fix typo in link