Improve Vagrantfile
Improve Vagrantfile

* Default VM will have 768MB of memory, which should fix npm's OOM failures.
* Add future support for 'ansible_local' provisioner (once bugs are fixed
  in the next release), so Ansible will not be required on the host
  machine.
* Add a message explaining where the new Girder web server is running
* Make VM naming more clear and consistent.
* Mount the shared directory in a more obvious and accessible location.

Fixes #916.

manthey/girder,adsorensen/girder,Xarthisius/girder,data-exp-lab/girder,girder/girder,sutartmelson/girder,kotfic/girder,data-exp-lab/girder,Kitware/girder,kotfic/girder,jbeezley/girder,Kitware/girder,girder/girder,sutartmelson/girder,Kitware/girder,manthey/girder,essamjoubori/girder,RafaelPalomar/girder,salamb/girder,essamjoubori/girder,Xarthisius/girder,adsorensen/girder,RafaelPalomar/girder,sutartmelson/girder,Xarthisius/girder,salamb/girder,sutartmelson/girder,Xarthisius/girder,RafaelPalomar/girder,essamjoubori/girder,manthey/girder,kotfic/girder,salamb/girder,kotfic/girder,jbeezley/girder,kotfic/girder,data-exp-lab/girder,girder/girder,essamjoubori/girder,Kitware/girder,data-exp-lab/girder,adsorensen/girder,girder/girder,adsorensen/girder,RafaelPalomar/girder,Xarthisius/girder,adsorensen/girder,salamb/girder,sutartmelson/girder,data-exp-lab/girder,salamb/girder,manthey/girder,jbeezley/girder,RafaelPalomar/girder,jbeezley/girder,essamjoubori/girder