sdorgancs

Hello, I would like to be able to set the region using url parameters, like in the example below: ```python fs = open_fs('s3://testbucket?endpoint_url=localhost:9000&region=us-east-1') ``` But S3FSOpener in opener.py doest not...

Test on ERBC

This change would allow being compatible with vagrant-scp which is handy for testing purpose

Same reason as issue #68

A very nice feature to have for development should be to add safescale ssh mount command usind sshfs to be able to mount a remote repository on the safescale client...