removed unused var
added new model for github
updated the structure of models
removed multiple vars from app.js
added new model for github
updated the structure of models
removed multiple vars from app.js
updated model structure to be self invoking
updated github services to their own collection
merged unmerged pull request
Merge pull request #49 from burrows-codefest/feature-server_tidy_up_new_git_webhooks

restructured models and tidied up server code