updated tables so they have default sorts. updated paginable clear/search links ...

added logic to retain sort info after search

fixed sort link and updated tests

reverted changes to concern and paginable/search erbs

reverted tests

destroy action for themes. DMPRoadmap/roadmap#939 ...

unobtrusive ajax for plans#set_test. DMPRoadmap/roadmap#939

unobtrusive ajax for plans#duplicate. DMPRoadmap/roadmap#939

unobtrusive ajax for plans#visibility. DMPRoadmap/roadmap#939

renamed new_edit.js for themes. DMPRoadmap/roadmap#939

server logic for themes index, new, create, edit and update actions. DMPRoadmap/roadmap#869 ...

client logic for themes new_edit view. DMPRoadmap/roadmap#869

functional tests for themes_controller. DMPRoadmap/roadmap#869

helper path instead of url_for. ThemePolicy without namespace. DMPRoadmap/roadmap#869