Include libraries in plugins view.
Updated plugin description.
Changed the filter name in the plugins list.
Added LIB_URL constant definition.
Merge pull request #5 from lowtone/master

Fixed SSL certificate verification.
Switched default plugins list table for custom list table.
Updated styles for libraries in plugins view.
Included text domain.
Added activation, deactivation and uninstall options.
Library listing only available for WordPress 3.5 or greater.
Fixed library listing.
Merge pull request #6 from lowtone/develop-libraries-list

Show libraries in plugin overview.