Commit current state of claimed tasks filter development. Part of #932
Fleshed out implementation of filterStream() some more. Part of #932
Filter is more or less implemented, but some little errors and style/layout issues need to be fixed. Part of #932
Upgraded Dart to 1.5.1, added stored procedure for filtering user claimed tasks, API TaskDao function to call the procedure, related strings for UI. Part of #932
Fixed errors in setup of arguments in PHP DAO for stored proc. Part of #932
Finished reimplementing claimed tasks stream filter. Part of #932
Fixed some styling issues. Properly display message when a given selection of filter options results in an empty task list and hide pagination div. Converted filter UI from using tables to divs. Part of #932
Added some more doc comments to Dart DAOs. Part of #876
Merge branch 'claimedTasksFilter' into develop