added dropdown
can add new resources via dropdown
refactored new method to eliminate long case statement
refactored create method to eliminate case statement
moved resource creation into application controller method
removed superfluous query in url
second attempt at refactoring resources controller code.
forgot to add this file
checking whether resources instantiated in #new are valid types
Merge pull request #9 from npostolovski/add-new-resources-via-dropdown

Add new resources via dropdown