1.9.1

Fix remove site not actually removing backups from vagrant-triggers

From 1.9.1 :

Add Hooks system for extensibility and modifications
Add SITENAME / SITEDOMAIN instructions to Blueprints
Add tab-completions in both Bash and ZSH
Allow installing trunk version of WordPress
Add folder creation to blank site set up
Remove database backups when removing a site with vv
Confirm VVV path when auto-grabbing it
Switch from '~' to $HOME for portablility
Add automatic Travis testing
General shell script clean up / security / sanity checks added.
Added --debug-vv flag for easier bug reporting.
Clean up multiple url handling code for vv-list
Allow for sourcing vv and leveraging code that way
README spelling fixings
Fix vv list breaking for more than 3 domains for a site
Allow overriding the error of site not existing for vv remove
Add ability to define the language to install WP with the --locale / --language flag
Load settings from vv-config just in bash, removing the need for python to be installed
When proxying images from a live site don't proxy uploaded images
If running creation for only files, don't halt vagrant before creating the files
Allow passing in site name directly to vv remove
Add vv_internal_debug to see exactly what code is running when.
Remove 2016 when removing defaults