Improve behavior of selectize editor.

* clearSelection when the editor is initialized.
* complement options.
Rename Activities.type to Activities.action.
Add LocalDateCell to GridView.
Improve SelectCell styles.
Improve LinkCell.
Version bump Backbone due to workaround for https://github.com/jashkenas/backbone/issues/2416.
Add workaround to MomentCell due to avoiding errors when the date is blank string.
Adjust grid styles.
Add activities list view (wip)
edited Guardfile

(enable to test RSpec under api/v1/)

(enable to run rspec when factory girl file was edited.)
ignore swp file generated by vim
Enable to toggle done at activities list view.
Add workaround to Backgrid.SelectRowCell for restoring the model attribute.
Improve fetching API.
Change event name.
Fix to show the latest activity
Fix for latest Backbone
Enable to add new organization by selectize editor.
Change Deal.accuracy to integer
Fix binding to serialize the data on form view