Add PHPMemcachedAdmin 1.2.2 to view memcached stats

Now accessible via http://192.168.50.4/memcached-admin/ by default, PHPMemcachedAdmin provides a look at the various goings on of Memcached inside the virtual machine and can offer a valuable picture when troubleshooting caching issues.
Update README and Changelog to reflect phpMemcachedAdmin addition
Initial add of phpMyAdmin installation to default web

Developers transitioning from tools like MAMP are often using phpMyAdmin as part of their workflow. This commit grabs the 4.0.3 version of phpMyAdmin and extracts it for use in the http://192.168.50.4/database-admin/ tool.
Update README and CHANGELOG to reflect phpMyAdmin addition
Add Bootstrap to boostrap a simple navigational page for tools included with VVV

I know... but it's easy.
Start getting ready for a Boostrappy display
Basic build out to beginnings of dashboard page
Add other tools to new default navigation
Update wp-cli on during provisioning

No sense in letting wp-cli get stale on us. Using rebase here to throw a smarter error when there are unstaged changes in the wp-cli working directory. Not sure if that's best, but it'll do for now.

Closes #82
Set WP_DEBUG with wp-cli extra-php parameter

Now that we're updating wp-cli on provision, we have access to the new extra-php parameter in wp-cli. This allows us to add PHP code to the wp-config.php file as it is created by wp-cli through the use of here-docs.

Here-docs are ugly and screw with the indentation of the provision.sh file, but that's cool. It might be worth piping in PHP from a file if possible and if we ever get to the point where we need something more complicated set.

Closes #81
Refresh inline provisioning docs
Update Composer on every provision instead of tracking on commit hash

Tried to get fancy by tracking the commit hash, but that was pretty dumb. The hash gets older and the installations created via VVV get newer and newer...

Go back to the method where it updates on every `vagrant up` or `vagrant provision`