Added example project for demonstrating SQKCoreDataOperation.
Class for interfacing wit Github API.
Ignoring .plist containing Github access token.

File still added as a reference to the Xcode project, so it will be necessary
for others to add this file with their own access token from
https://github.com/settings/applications#personal-access-tokens

GithubToken.plist has single key value pair.
'token' : 'access-token'
Interfacing with Github API for commits from SQKDataKit repo.
Interfacing with Github API for users.
Generated model classes.
Unit tests linked with SQKDataKit.
Class for importing Commit JSON.
Fix for unit test target not being linked with pods correctly.
Stub unit test for commit importer.
Setting commit message on import.
Stub Users imported during Commit import.
Importing Users from JSON.
Importing user properties.
Operation to obtain Commits from Github API and import into core data.
Operation to obtain Users from Github API and import into core data.
Added data synchroniser class. Removed view controllers.
Order of synchronisation determined by an array of block to exectute.
Finishing synchronisation on the main thread.
Reorganised Xcode project and directory.