Update README.md
Fixed single element + trailing slash check

elemId is returned as an empty string, not undefined or null
The previous checks resulted in a false positive.
Re-adjusted single element check
grunt generation
Merge pull request #173 from cboden/single-ts-fix

Fixed single element + trailing slash check
Merge pull request #178 from skaterdav85/master

Adds a unit test for getRestangularUrl()
Adds unit test for addElementTransformer - custom collection level method
Adds unit test for addElementTransformer - custom element level method