Improving the bots

[Ronan]

For pastebin.com @@ is used to highlight a particular line, but even if diff is specified in Syntax highlighting, @@ is removed.

[mand1nga]

Recently I've commited two improvements to the bots navigation ai which I like to comment a bit:

- Doors recognition
Before this change doors were to bots just like walls. Placing waypoints for making the bots to see doors is quite easy, just be sure to make them face the doors as directly as possible. I've made a short video showing this.

- Swimming (and ladder handling)
If a bot falls into water it will try to reach the nearest visible waypoint on ground, using ladders if necessary. Here is a sample video showing this.

Both features are currently on SVN but might not be present on 2.5.

Enjoy!