Show that the channels key exists.
Change var format to fix #105
Change default timezone to UTC #104
Merge pull request #100 from wizonesolutions/feature/document-php.pear.channels

Show that the channels key exists.
Fix for issue 110:  may fail to load protobox config file
Merge pull request #111 from zacwasielewski/issue110

Fix for issue 110:  Vagrantfile may fail to load protobox config file
Make PEAR a little smarter.

This lets PEAR still work if provisioning is re-run. It seems to work as-is even though
it's an array; at least, it has for me. Inspired by:
http://stackoverflow.com/questions/20804004/installing-php-pear-packages-via-ansible-with-idempotency
https://github.com/geerlingguy/ansible-role-php-pear/blob/master/tasks/main.yml

GH-101: Use more accurate check.