0.7.4
  - bump version

0.7.3
  - fix plugins import

0.7.2
  - Fix Paginator and filters
  - PEP8

0.7.1
  - add DateTimeColumn
  - copy all plugins to the table instance
  - improve DropDownFilter to use handlers in the table instance for build options

0.6.2
  - fix set default refname

0.6.1
  - set default refname by column name
