Refactored table folder and modules

* Moved formotion_screen into thirdparty
* Simplified GroupedTable
* Removed PM::PlainTable
* Moved RefreshableTable and SearchableTable into
PM::Table::<modulename>
* Combined table.rb and table_screen_module.rb which were similarily
focused
* Removed extraneous/redundant module SectionedTableScreen (it's just a
TableScreen)
* Moved searchable/refreshable into /extensions folder

All tests passing: 197 specifications (334 requirements), 0 failures, 0
errors
Fixing unit tests
Going back to wait x.x …works better
Merge pull request #186 from clearsightstudio/refactor_table_modules

Refactored table folder and modules