commentrss 5.x-2.0

Changes since 5.x-1.2:

• Generic UI cleanup and bugfixing.
 
- Clean up install and uninstall process. Use consistent variable defaults
  instead of defaults set on installation.
- #161150 report by twohills, patch by myself: Add different options for site
  front page feed exposure, and prevent all site feed from appearing on
  other pages. Setting backwards compatible.
- Update help text to describe feed features better.
- Moved settings page under 'RSS publishing' setting in admin > content.
- <a href="/node/198151">#198151</a> report by ragaskar, patch by myself: avoid node comment RSS feed
  from appearing on other pages.
- Simplified callbacks for feeds so that we don't need internal wrapper.
- <a href="/node/187595">#187595</a> report by Boobaa: tie to 'access comments' permission instead of
  'access content' for access to the comments feeds.
- Removed lots of dead code from node comment feed generation code.
- <a href="/node/189829">#189829</a> reported by zostay, mostly fixed already, but one missing piece:
  Built in check for comment support on node, so that a node feed will not
  be accessible at all if the node does not support comments.
- Remove vocabulary feed as vocabulary_list module is not supported for
  years. Will look into Views integration later.
- Added lots of phpdoc to API functions.
- Align namespace handling in channel feed to core patch suggested at <a href="/node/157709">#157709</a>
- Rethink commentrss_format_items() to join on {users} instead of doing a
  user_load() on all comments handled. This leads to much better performance.
- Better descriptions on settings.
• Generic UI cleanup and bugfixing.
• #214958 by Junyor and myself: add context to comment feeds, so people can identify where comments are coming from
• Marking sections in the code and reordering according to that.
• Follow up to #161150 by Junyor: classic logic error with COMMENTRSS_SITE_FRONT_AND_NODE_PAGE