v1.4.1 upgrade version bugfix

Fixed bug where the version number would not update in the control panel after upgrade.

EE v2.10.1 Compatibility

Thanks to Rakesh and Tom from StackExchange for the hotfix.
http://expressionengine.stackexchange.com/questions/31439/member-group-tabs-throws-blank-screen-after-ee-upgrade-to-2-10

add_to_head deprecation fix for EE2.8 and above

Merge pull request #4 from surprisehighway/ee28-compatible

add_to_head has been deprecated since 2.8