Added stronger language to warn users if they are submitting a dataset that already exists in MG-RAST and providing them with file size information.  Also, sending an e-mail to mg-rast if the user allows a duplicate submission of a job that is over a size limit (e.g. 1GB).
Merge pull request #286 from jaredbischof/develop

Added stronger language to warn users if they are submitting a dataset t...