fix(uiSref): fix to uiSref when using dynamic state names

[lee-tunnicliffe]

Fix to ensure href updates when the state name or the params change as
opposed to just the params.

Closes #395

[mrzepinski]

+1

[timkindberg]

This doesn't work when I run the karma:past grunt task. Something about angular 1.0.8 doesn't run the attrs.$observe handler after the $scope.apply call. I can't seem to figure out why. I wonder if we still need to support 1.0.8?? @nateabele?

[timkindberg]

Does this work with relative state names too? '.child.grandchild' or '^'

Also does this work with having the parameters (both key and value) be interpolated?

We should add tests for those things too.

[christopherthielen]

@timkindberg @nateabele what say you?

[nateabele]

(1) The mustaches look super ugly to me. I'd actually prefer something like ui-sref="[stateName, params]". (2) I'm pretty sure attrs.$observe() wasn't introduced until 1.2.x.

[nateabele]

Closing this as we decided to roll with an alternate directive.