New Reload system hits trunk

[Griatch Art]

With r1634, the development branch was merged into Evennia trunk. Here are some of the changes:

• Evennia was split into two processes: Server and Portal. The Server is the core game driver, as before. The Portal is a stand-alone program that handles incoming connections to the MUD. The two communicate through an AMP connection.
  
• Due to the new Portal/Server split, the old reload mechanism is no more. Reloading is now done much more efficiently - by rebooting the Server part. Since Players are connected to the Portal side, they will not be disconnected. When Server comes back up, the two will sync their sessions automatically. @reload has been fixed to handle the new system.
  
• The controller script evennia.py has been considerably revamped to control the Portal and Server processes. Tested also on WinXP. Windows process control works, but stopping from command line requires python2.7. Restarting from command line is not supported on Windows (use @restart from in-game).
• Courtesy of user raydeejay, the server now supports internationalization (i18n) so messages can be translated to any language. So far we don't have any languages translated, but the possibility is there.
  
• @reload will not kill "persistent" scripts and will call _at_server_reload()_ hooks. New @reset command will work like an old server shutdown except it automatically restarts. @shutdown will kill both Server and Portal (no auto-restart)
• Lots of fixes and cleanup related to fixing these systems. Also the tutorial_world has seen some bugs fixed that became more obvious with the new reload system.
• Wiki was updated to further explain the new features. 

As usual we need more people to try this out. Enjoy, and remember to report any bugs to the issue tracker!
.
Griatch