Find and exec vvv-init.sh before finding vvv-nginx.conf

The vvv-init.sh script may in fact generate vvv-nginx.conf files on the fly.
Inline auto-site-setup so init-generated vvv-hosts can be found
Accomodate server directives that have hundred(s) of server_names

For example large multisite networks.

This change enables a network with 179 server_names.
Increase auto-site-setup seach depth from 4 to 5
Merge pull request #199 from x-team/init-then-nginx-conf

Allow vvv-init.sh to generate vvv-hosts and vvv-nginx.conf, etc
Make sure .subversion directory exists before copying user config
Add Ruby and Sass
Merge pull request #205 from aaronjorbin/ruby

Add Ruby and Sass to meet new WordPress develop.svn requirements

Closes #204
Include note in readme about Virtualbox version on Mavericks
Modifications to language around the use of Virtualbox 4.3.2 with OS X MAvericks
Update contributors list
capital_B_dangit() - s/Virtualbox/VirtualBox/
Merge remote-tracking branch 'upstream/master'