Composite stack support

Neuromantic V1.6.0 will be released tomorrow - the main update here will be the support of composite stacks made of multiple image stacks. These composite stacks may be saved and loaded via project files (*.nproj).

For the first release, there will be several limitations:

* All stacks will be loaded at once and remain so, so no memory saving is made. This constraint will be quickly relaxed in future releases so that you can free/reload stacks as desired.

* Rotated composite stacks (if you've rotated in X/Y or Z) cannot be saved with a project file. This can be circumvented initially by saving the composite stack prior to rotation, and making sure that the stacks are rotated back to the original position before saving the reconstruction. This constraint will also be relaxed in future, although it will take longer as it relies on me finishing the improved stack viewing algorithms.

Update on Multiple Stacks with Neuromantic

At CNS 2007, several people requested functionality for Neuromantic such that multiple image stacks could be loaded in simultaneously, some as a prerequisite before it could be useful to them.

Now, mainly because I find it hard to resist a challenge, I have been working on this very problem. It is not complete yet, but in my current test version it is now possible to load and display several stacks (although the semi-automatic tracing has not yet been updated to work with this). Also, it is not yet possible to register the stacks yet, but that's just a straightforward case of adding functionality to the GUI to alter the various stack parameters.

As well as each stack having its own global offsets in the space, each individual stack bitmap will be able to be perturbed in x,y a little to account for any jitter that may be present, in a similar way to the Reconstruct application.

Finally, I'll need to sort out some appropriate memory management so that the application will load/free bitmaps as required dependent on the memory available.