Added resetHash method to hashmanager

For situations where registered tabs on a page need to be cleared out and re-initialised (e.g after a transition in a single-page app such as Help).
Compiled versions
Merge branch 'hashmanager-reset' of https://github.com/fulljames/web-toolkit into fulljames-hashmanager-reset

Conflicts:
	dist/scripts/toolkit.js
	dist/scripts/wiki.js
	dist/stylesheets/toolkit.css
AG: pull request for helpcenter - new method in hashmanager. bump to v1.7.2