added logger utility function
adds 'init' to load activities on starting app
adds activity name to DOM
implements addActivity to grab new activity from DOM and post to database
implments adding activity to database and DOM from input field
added custom filter to reverse activities list
added custom directive to allow adding activity on 'enter' event; removed input button
removed logger function
added simple styling and delete 'buttons' to items
added delete method to activitiesFactory
changed activity.name to activity
implements removal of activity from database by DOM click
removes activity from  DOM on item deletion from database
changed html and css to prepare for implementation of updating functionality
implements update from DOM to database