Implemented upload functionality. Now it works when deployed and is
also able to handle files bigger than 1 MB. Some integration pending.
Dummy commit.
Merge branch 'andres_upload_bug_fix'

Conflicts:
	war/WEB-INF/classes/.gitignore

Also:
Integrated the upload functionality into the application. I modified
some other files to improve the user experience.
Dummy commit.
Merge branch 'master' of
https://github.com/Zhibin-Zhang/PosterManagementSystem.git

Conflicts:
	war/WEB-INF/classes/ordappengine/DatastoreControl.class
	war/WEB-INF/classes/ordappengine/NetworkServlet.class
	war/WEB-INF/networkendpoint-v1.api
	war/index.jsp