Updated homebrew cookbook.
Switched php to the homebrew php tap.
Removed custom php formulas.
Finished switching to php tap, added support for multiple versions.
Added initial command for php switching.
Removed manual homebrew update.

Homebrew cookbook does it now.
Added missing php.ini template.
Added a check for the php config databag, creates if it doens't exist.
Moved pear perms fix so that it only runs on the active version.
Updated slowlog variable to non-deprecated version.

Looks like mariadb 10 removed the old one.
Add missing homebrew/versions tap.
Removed old php and xhprof cookbooks.
Removed custom formulas.
Removed formula copying.
Added basic validation for php-switch.
Added initial test for php-switch validation.