Added new "LogicMonitor" module.

This module will allow users to manage their LogicMonitor (www.logicmonitor.com) account via Ansible.
Current management tools include:
- Manage your hosts
-- Adding hosts to monitoring (and automatic discovery of points of interest) including multiple host group membership and custom host properties.
-- Place a host in Scheduled Down Time (SDT) to suppress alerting during a maintenance window.
-- Remove hosts from monitoring
- Manage your host groups
-- Add host groups to organize your account. Can also apply custom properties for the hosts to inherit.
-- Place a host group in SDT to suppress alerting for multiple hosts under maintenance
-- Remove host groups to re-organize your account.
- Manage your collectors
-- Add collectors to your monitoring system. will download and run collector binary on the device.
-- Place a collector in SDT to suppress alerting on a collector under maintenance.
-- Remove a collector from your account.