Merge pull request #3 from codepreneur/uploadingimages

Uploadingimages
Fixed undefined @work for profilecreation tests
Created collections model and nested routes
Collection belongs to works
jbuilder renders appropriate collection/work json
User collections index displays collection title and link to new work path
Rearranged model relationships. Collection has many works instead of belongs to. collection.works.new is now a defined method
User can add now add image works to a collection
Each collection has own show page. Uploading images validates title and file in HTML as well as database
Fixed bug where adding to collections opens all options on collections index