updates api endpoints and uses wix instances
Changed design to make add files button work
Implements ansync resumable file upload to Google Drive
implements resume of file upload to google drive on error
Merge pull request #15 from andreywix/Feature-AsyncResumableFileUpload

Feature - Asynchronous Resumable file upload
Feature: Added file uploading to browser (not yet to backend server) using angular-file-upload library. All uploaded files are listed.
Fixed syntax error in bower.json file
cleans up unnecessary code
implements sessions database
Merge pull request #17 from andreywix/Feature-Sessions

Feature - Sessions
Most of the code for file uploading to the server is now set up.
Added error messages for not adding a message or any files
Merge pull request #16 from jeffreywix/Feature-FileUpload

Feature file upload
adds files database and handling of individual file uploads
Added functions in controller for dealing with aborting file uploads and keeping track of progress. Also fixed issues that would have prevented user from doing multiple file uploads.
organizes the server into modules
Merge pull request #18 from jeffreywix/Feature-AbortingAndProgressBar

Aborting and Progress Bar Functions + other minor changes
better error handling
Fix bug with conditional styling through angular and cleaned up code
Merge pull request #19 from jeffreywix/Fix-StyleandCleaning

Fix bug with conditional styling through angular and cleaned up code