Add Jekyll::Logger
Add Jekyll::Deprecator
Run Jekyll::Deprecator.process upon invocation of Jekyll
Bring Logger and Deprecator into the fold
Move manual printing to Jekyll.info and Jekyll.warn
Add colorator gem
Colorize warns as yellow
Matching tests to new colorized output
Error message is red
Remove Logger methods from main Jekyll module.
Merge pull request #959 from mojombo/deprecator

Refactor Logging and Deprecation Messaging