Definitions for ngProgress

Definitions for https://github.com/victorbjelkholm/ngprogress
Revert "add INgModelController#$setPristine()"

This reverts commit 22d7bbaa48074f41e8bac9ea66a9a202fcd4c8cb.
Updated url
Fixed return type of #status()
Merge pull request #3333 from martinmcwhorter/master

Defs for ngProgress