Updated `module/git': WIP
Updated `module/vault.read()': split into pub/int

The public `read()' function was split up into public and internal.

Unit test for the new private function added.
New `module/mongo'
New `module/softlayer'

New site module that interfaces with `extern/softlayer'.
Updated `libexec/softlayer': flag for cache added

Added a programatic flag (variable) to enable/disable caching, and
set that to false as softlayer API calls are not too costly.
New `module/pagerduty': pagerduty module
Updated `travis'

Moved some package installs into the specific module requiring it in
order to reduce the shared build commands, thus speeding up all
builds as a result.
Updated `module/remote': ldap dependency removed

This module no longer (directly at least) depends on the ldap module.