fixes #1318
         - restructured the layout to make use of the boostrap column layout
         - fixed anymation on show/hide filters
         - removed Bootstrap Multiselect and Chosen libraries - as they were added just to create a dropdown - we use Select2 for that
         - addded date range placeholders with coming soon
         - fixed and styled the selected facetes(filters) list
         - switched the selectors which were using some new libraries to the Select 2 library which we're using all around; had to fix the selection process;
         - added "Any" item with different color as the default not selected state
         - fixed Select2 issue in BS 3.2
Merge remote-tracking branch 'origin/arti-sprint-33' into dev-merges
Merge pull request #1327 from OCHA-DAP/dev-merges

Dev merges