Changed CMake modules loaded in top directory.
Added templates for CMake.

  * Added directory for CMake templates.
  * Added installation information for CMake templates.
Added template for plugin defintions.
Updated versioning generation for Wintermute.

  * Checked if Wintermute is being built locally.
Updated variables and plug-in macros.

  * Added functionality for plugin defintion generation + installation.
  * Ensured Wintermute's installation prefix is maintained.