Use proper datetime data in update SQL
Add mediawiki package from the platform.
Remove JFeed tests due to library updating to Platform version
Fix code style
Update version for 3.1.0_beta2 release
Fixed alignment of admin menu icons

Joomla 3.1 has introduced the menu icons in the admin top nav again (for components, etc).
However, when using the standard 16x16px sized icons, the alignment is off.
This fix corrects that issue.

#### Testing instructions
If you don't have a component with an icon, add an icon to a component by placing the url (relative to the admin folder) of the icon in the 'img' field of the #__menu table for that component.
Update template.css
Update template.css
Update template.less
 # [#30340] Fix regression in Similar Tags Module. Thanks Elin
 $ Duplicate lang string +
extraneous space
 # [#30320] *Deleted Tagged items are not deleted from the map table and
core_content table. Thanks Elin
 # [#30346] *Contact creator does not include default language "All" for
the contact created
 # [#30330] *Correcting alignment of metadata labels in Category edit
 # [#30339] Component Update Info URL - open in new tab. Thanks Glen
typo in all installation ini files
correcting BOM
removed icons completely from isis admin menu
removed icons completely from isis admin menu