Hive system 0.90a

0.90a is a pre-release of 0.90, the first beta version of the hive system.
This version requires Spyder 3.2
This is a pre-release, because the hive system is basically feature-complete, but documentation and tutorials are lagging severely behind. This will be updated in the coming weeks.

- Module "libcontext" is now ~20x faster in starting up your hive, and is now in beta
- Module "bee" received many small bug fixes, and is now in beta
- Module "dragonfly" (standard node library) is still in alpha, many nodes are still needed
- Module "hiveguilib" (the GUI) is now beta-ish: while it received many new features, there is still a lot of work to be done in terms of usability: undo, layout and general appearance. Also, it is still running only under Qt, not under Blender.

Major new features:
- Libcontext has received a large overhaul, and hives will start up much faster. For medium-sized hives (Tetris), the difference is about 20x.
- HiveGUI's hivemaps are now first-class citizens. You can now instantiate a hivemap inside a hivemap, parametrize it, and make connections to it as to a worker. The parent hivemap can again be instantiated as a node within another hivemap, etc., to any level.
- A completely visual hivemap implementation of Tetris, no Python code outside the modifiers. This will be the starting of a visual-oriented tutorial. The Tetris implementation can be found in bee/tutorial and in the tutorial.tgz
- Support for hierarchical data block workers. You can connect now not only to antenna/output "house", but also to "house.floor" and "house.floor.kitchen.sink"
- Support for adding drones and attributes to hivemaps.
- Spydermaps, editable with a new SpydermapGUI, for defining arbitrary data and parameters. Spydermaps are embeddable inside hivemaps.