updated modals for delete, new folder

add modal ctrls for new folder and delete

added $modal and $log dependencies to ButtonsCtrl

refactored deleteButtonClick to use new modal

refactored newFolderClick to use new modal

added ui.bootstrap dependecy to medialibrary module

and cleaned up some code (commas at the end of template)

added modal size parameter for buttons

added ui-bootstrap js and ng-templates for modals

controller tests for delete and new folder ctrls

move templates, copy over changes to modal.html

ran gulp build and updated dist folder

made buttons look like style-guide