Split TVB_Simulator Library

Should be part of this library:

• tvb.core.traits
• tvb.core.logger
• tvb.datatypes (including - for now - framework subclasses)
• tvb.simulator
• tvb.analyzers

The library should be put on SVN in a totally separate folder (for easy GIT-SVN integration).
We should make sure that tvb._init_ accepts two tvb root folders.
TVB build scripts should be modified to support the new SVN structure.