Fixes to work with 1.3.0

This incorporates #94 as well the fixes from #96 as suggested by @giannisp and currently removes the blur as suggested in #95.  I believe the switch to use modelValue is necessary if we are comparing it against a date as the angular docs say that viewValue should be a string.

This at least passes all tests using 1.3.0 and 1.2.5 however I am still concerned that we are removing the blur to workaround what might be related to issue angular/angular.js#8762.

Still I am submitting this to hopefully get closer to a full solution and this full pull request will at least pass all the tests.  If someone has some suggestions on a good test case for when we need the blur that would be great and we can enhance this further.