2 new experiment search conditions

[Marlon Pierce]

test-drive.airavata.com continues to run well for testing.  I have some 
suggestions for improved search for regular users:

* By experiment status: show all failed jobs for a given users, for example
* By experiment creation date: show only jobs launched after 2014-08-18 
for a given user, for example

* By project: show only experiments associated with a specific project.

Marlon