My last try at pulling: Defender and balancing

Defender model complete with ogre vertex fails (totally needed) and
balancing of creatures, battles should go faster and be more deathly
now.
indentation fix?

Hopefully fixed it; if not please someone do it.
Indentation hell

this is it!  curse you Git!
Merge pull request #372 from Danimal696/https-/github.com/Danimal696/OpenDungeons

My last try at pulling: Defender and balancing
Removed the HLSL and GLSLES folders.

The Cg/ one is needed on Windows if we're not using the Cg plugin.
And the GLSL and GLSL150 can be used depending on the hardware used AFAIK.
Removed the need of @OPENDUNGEONS_MEDIA_DIR@ + misc things.

I also added the missing octree debug plugin and remove various useless lines.

Part of #367
Actually fixed setting the game data path and version when using MSVC.

The last time, my cache flawed my tests.

I also made sure to display Cmake Cxx flags correctly when on MSVC.
Added missing licensing info for the Defender.

Thanks to Danimal for pointing out. :)
Merge pull request #373 from hwoarangmy/development

Added console commands to see visible tiles for a seat and to allow creatures to spawn at levels > 1
Install man page and documentation on Linux (fixes #357)
Merge pull request #378 from akien-mga/development

Add a man page and install it on Linux (fixes #357)
Add AUTHORS file listing past and current contributors

Fixes #379
Merge pull request #380 from akien-mga/development

Add AUTHORS file listing past and current contributors
Removed the GLSL150 folder and path in resources. Readded the Cg resource path.
Fixed a typo and added a warning about using local data.

Thanks to @akien-mga for pointing out.

Part of #383
Added a first version of a new skirmish map.
New skirmish and multiplayer level Greed or Might (FFA 3 seats)
- Add level template
Link temples to portals in Greed or Might
Also add *.level.bak files to .gitignore
Merge pull request #384 from akien-mga/development

New skirmish and multiplayer level Greed or Might (FFA 3 seats)
Made the creature spawner rooms taken in account in the kill all enemies objective.