Fixed version number in JS files

Forgot to change the version to 1.2.6 when releasing the latest release.
Updated to v1.2.7

Added a new option to determine how much the z-index should change
between different states of Fluidbox. Also fixed a minor issue with the
transitionend event not being unbound.
Merge pull request #41 from terrymun/master

Syncing gh-pages