Files server

Putting all the smallish files that are on files.opentreeoflife.org under version control.  Some were copied from gcmdr repo, some from the previous files.opentreeoflife.org incarnation on norbert, some are new. Deploy using './push.sh ... files' (documentation TBD). 

Rather than put the big files (OTT versions and synthetic trees) under version control, they're manually managed.