Merge pull request #67 from abenari/master

fixed has_many_through join function for polymorphic relations
Bump version to 2.6.2
fixes an issue with has_many_through and polymorphic associations when source option is used.
added tests for has-many-through polymorphics relation with source_type option
Merge pull request #68 from abenari/master

fixes an issue with has_many_through and polymorphic associations
Bump version to 2.6.3
Add support for jQuery > 1.9 (issue #70)
Merge pull request #71 from rpaterson/jQuery19

Add support for jQuery > 1.9 (issue #70)
Bump version to 2.6.4
Merge branch 'master' of github.com:wvanbergen/scoped_search into autocomplete_false