adds script for running tests on server

SelBench user extension still needs work, but once it's right this
should be a snap to test.

This will grab the user-extensions.js file in
C:\projects\selenium\selbench\SelBench\user extension Assuming you have
this script at
C:\projects\selenium\selblocks\SelBlocks\testUserExtension then it will
concatenate the selbench script with the user extension for selblocks
and the tests will be run.