Grouping fixed
Added MySQL and PostgreSQL fulltext extensions
Travis fixes regarding multi-db tests
JRuby fixes, default database environment variable
JRuby fixes for travis
Readme extended
More readme extensions
Using collection object for multi column aliases
Directly visit collection for fulltext attributes
Added option to disable left wildcard
Added custom dictionary support for postgres
Added options to specify default fields
Tiny mysql test fix
Optimize fulltext searches by flattening and grouping nodes
Optimally optimize fulltext queries