Fixed the portals idle and spawn animation used.

I also fixed a bug making the portal not triggering the Idle animation again
after spawning.

Fixes #390
Fix doc installation
Readded DirectX renderer support on Windows.

Fixes #389

I also made the manpage documentation file created by cmake ignored by git.
Merge pull request #392 from akien-mga/development

Fix doc installation
Removed again support for the D3D9 renderer as it is not working.

At least with Ogre 3d 1.9.0.
Merge pull request #391 from Bertram25/development

Fixed the portals idle and spawn animation used