spec file for ApplicationModel
Revert "spec file for ApplicationModel"

This reverts commit 0366ca016a9a5050bb05f3a9ea89b3e455b05f73.
small modification by adding ApplicationModel class
Merge remote-tracking branch 'upstream/master' into gitbranch

Conflicts:
	app/models/notification.rb
Merge pull request #7 from csaurav/gitbranch

Small cleanup by adding ApplicationModel abstract class