Adding HMR

[torabian]

I think it's more interesting to add hmr support for this seed.

[gkalpak]

We are trying to keep this seed unopinionated and basic (i.e. only concerned with the AngularJS stuff), so that it can be easily adapted to any workflow. If I am not mistaken, HMR (if at all possible) would require the introduction of a build tool/bundler and impose more restrictions.

This is outside the scope of this seed. _{Note, this is the AngularJS (1.x) seed.}