FLUID-4036

Removed the rsf:id's from the pager demos and tests. To go along with this change I added selectors for header and row. Things should still be backwards compatible though. Also removed the integration demos as they only contained one for pager integration in a sakai context. Rather than fixing it, I removed it, since we don't need this demo anymore.

http://issues.fluidproject.org/browse/FLUID-4036