chore(exports): Facilitate importing of module

[mnaser]

With this patch, when using webpack or any dependency management,
you’ll be able to write require(‘angular-breadcrumb’) instead of
manually writing it out.

[coveralls]

Coverage increased (+0.03%) to 94.737% when pulling bf3449a on vexxhost:master into e6e92aa on ncuillery:master.

[stramel]

I think this is probably a different way of handling #147 #158

[mnaser]

Closed in favour of #147 #158