FIX #58 on page duplicate

Fixing issue #58 where WidgetAreas end up being linked to multiple pages at once
Change of yml name

changed contentcontroller-url-handler to contentcontrollerurlhandler so that it can be overridden.
Merge pull request #65 from Leapfrognz/yml-change

Change of yml name
BUG Fixed issue with nested InheritSideBar not inheriting beyond the first level
Fixed locale for AJAX requests on addWidget.

Currently locale is ignored with AJAX add requests, this patch sends the form locale with the request.
NEW Adding support for Translatable

At the moment, when using Translatable on a site, if you use the Tranlate tab to create a translated version of the page, the WidgetAreaID is retained and you experience the same issue as reported in #58

Related to: #59
Merge pull request #68 from TomSpeak/patch-2

NEW Adding support for Translatable
Fix dependency strings to work with rc's.
Use Config to get Widget::$only_available_in

Added support for use of Config to set Widget::$only_available_in so widgets bundled with other modules can be hidden, ex. blog module.
Merge pull request #69 from ryanwachtl/onlyavailablein-config

Use Config to get Widget::$only_available_in
Merge pull request #66 from tractorcow/inherit-sidebar-fix

BUG Fixed issue with nested InheritSideBar not inheriting beyond the first level
Merge pull request #59 from Mark-M/patch-1

FIX #58 on page duplicate
Merge pull request #67 from Sixfifty/patch-1

Fixed locale for AJAX requests on addWidget.
Updated master strings