Limit compat to 3.0
Only build 0.1 branch against 3.0 core

3.1 and master no longer supported there
Removed extraneous declarations
NEW Added WidgetPageExtension
Updated README to describe WidgetPageExtension

Removed obsolete "widget packaging" instructions, since its no different from packaging
other modules, and already sufficiently described on doc.ss.org
Update Widget.php
Update WidgetAreaEditor.php
Merge pull request #51 from NoBone/0.1

Updated Widget module to show hide Widgets in specified WidgetArea
Merge branch '0.1'