votingapi 6.x-2.0

Official release of VotingAPI 2.0, with a number of bug fixes, documentation tweaks, and updates to internal hooks that allow other modules to provide metadata.

#335668: Add system for registering voting tags (axes)
#332317: PHP Notice: desc in votingapi.test's getInfo() should be description
#322720: doxygen fix and enhancement - votingapi_select_votes()
#327903: Add "Individual voter" relationship
#396820: Anonymous vote rollover set to "Never" doesn't work
#497472: Relationship with Comments in Views
#341419: Less decimals

Important note for developers: If you were using hook_votingapi_content_types(), it's been renamed to hook_votingapi_relationships(). In addition, if you're using custom calculation functions or custom tags and need to build views relationships on those values, your module will need to use hook_votingapi_metadata_alter() to document its aggregation functions and tags. See the new votingapi.api.php file for details.