moved Article class into Article.h/m from Message.h/m for consistency
added Travis-CI config
Added Slack notification for Travis CI build
added the build status image to README.md, and commented out cocoapods in the travis config
added branch name for build image
Merge pull request #389 from josh64x2/refactor

Renamed Message.m/.h to Article.m/.h for consistency
removed homebrew commands from travis config
Merge pull request #392 from josh64x2/bugfixes

removed homebrew commands from travis config