Update capistrano-slack.gemspec
Update slack.rb
overhaul of gem.
Merge branch 'master' of github.com:cthomaspdx/capistrano-slack

Conflicts:
	lib/capistrano/slack.rb
Update README.markdown
Update README.markdown
Added default call backs
Update README.markdown
Update README.markdown
remove random emoji
:slack_deploy_defaults work without explicitly setting them.
changes for read me
Update README.markdown
Merge commit '1cb5dbbd090d38b69011c4dfad12f50c1e355606'

Conflicts:
	README.markdown
	lib/capistrano/slack.rb
Merge pull request #18 from cthomaspdx/master

Allow for custom notifications and messages.