Added definitions and tests for MathJax (https://github.com/mathjax/MathJax)
Added definition for Long.js
#2211: Add IUrlRouter interface for
Update CONTRIBUTORS.md

Added entry for MathJax definitions
Fix constructor
Include type definition for $watchGroup

https://docs.angularjs.org/api/ng/type/$rootScope.Scope
Update angular-route.d.ts to set missing params

Update angular-route.d.ts to set otherwise(params:IRoute)
Rename IUrlRouter to IUrlRouterService

More consistent with naming conventions for other services.
Add jsdoc for IUrlRouterService.
Add test for IUrlRouterService
Merge pull request #2209 from kerug/add-long

Added definition for Long.js
Merge pull request #2191 from rolandzwaga/mathjax

Added definitions and tests for MathJax
Merge pull request #2212 from jjeffery/issue-2211

#2211: Add IUrlRouter interface
Merge pull request #2217 from audsKu/patch-2

Include type definition for $watchGroup
Include type definition for $uiViewScrollProvider

See http://angular-ui.github.io/ui-router/site/#/api/ui.router.state.$uiViewScrollProvider
Add missing newline at EOF.
Update mocha.d.ts: add `context` statement
Merge pull request #2221 from otiai10/pr/update-mocha

Update mocha.d.ts: add `context` statement
Merge pull request #2220 from jjeffery/IUIViewScrollProvider

Include type definition for $uiViewScrollProvider
Merge pull request #2219 from ngbrown/patch-1

Update angular-route.d.ts to set missing params