Add support for using lxc as a vagrant provider via vagrant plugin

To use, run 'vagrant plugin install vagrant-lxc' to install the plugin
Use 'vagrant up --provider=lxc' to create the vagrant instance
When using an lxc vagrant provider, the hostname may not be localhost
Set initial tree position with "Use current location" button

Also:
* Update "Add Tree" HTML for how we think it should be
* In plotMarker.js, allow calling enableMoving() and disableMoving() from within module
Merge pull request #314 from maurizi/topic/lxc-vagrant-provider

Add support for using lxc as a vagrant provider
Style navbar, add responsive helpers
Remove _responsive.scss (unneeded), refine page styling for non-map pages and use bootstrap consistently
Add Create Map and Community Page prototypes
Merge pull request #317 from azavea/topic/new-prototypes

Community and Create Map Prototypes
Merge pull request #316 from RickMohr/geolocate-for-add-tree

Set initial tree position with "Use current location" button