luceneapi 6.x-1.2

Bug fixes:
- Added workaround to prevent plus signs from being converted to spaces when searching or paging through results.
- Wrapped the title of the "Faceted search" fieldset with a t() function call (thx Justin).
- Fixed requirements error that is always thrown by Search Lucene Content during a fresh Drupal install (thx Seth).
- Removed error message when attempting to remove a non-empty index directory on uninstall.
- Added source control files to the mask when removing index files on uninstall, because it is not polite to remove directories that are under version control.

Minor changes:
- Added a nicer message with a link to the installation instructions on the project page for ZF requirement failures on install.