2.0.0

Changes contain fixes/enhancements https://github.com/AmpersandJS/ampersand-view-switcher/pull/2 https://github.com/AmpersandJS/ampersand-view-switcher/issues/5 and https://github.com/AmpersandJS/ampersand-view-switcher/issues/1

I cleared up README, implementation and updated tests.
cc: @HenrikJoreteg