DLL & Invoke-Merlin PowerShell

Version numbers changed drastically to start following semantic versioning. Merlin now ships with the pre-compiled agent binary files with each Merlin Server download in the data/bin directory. You no longer need to download the agents separately. Support was added for a DLL version of the Merlin Agent. See the Agent Execution Quick Start Guide wiki page for examples. Added an Invoke-Merlin.ps1 script to reflectively load the merlin.dll into memory, but is not considered stable. Added Merlin's official logo to main README. Significant updates to Wiki for better support.

The compressed files have a password of merlin.