Add ModLoaderMP support to Canyon

[astei]

Canyon should add ModLoaderMP support. We do not strictly need ModLoaderMP support to be present in core Canyon, but it has to be an option. My current idea, after much thought, is:

• Canyon will be provided in two versions:
  • The vanilla Canyon server is compatible with CraftBukkit plugins only and does not allow mods to be installed.
  • The ModLoaderMP-enabled Canyon version retains CraftBukkit plugin compatibility and includes a port of ModLoaderMP atop Canyon (CB 1092 + custom patches). In theory, this should allow for both ModLoaderMP and Forge to exist on Canyon, but the latter is an untested theory.