Issue #134: original issue #1670312 modifying  documentation.
Issue #134: original issue #1477516 changing language name uighur to uyghur.
Issue #134: original issue #1728568 adding table alias in node query conditions.
Issue #134: original issue #716496 adding theme function documentation.
Merge pull request #140 from ronnienorwood/1.x

Issue #134: Drupal 7 backports.