1. graceful move to b*.jpg etc
2. disallow jumps in Z series, gaps makes life difficult. search for jumps on disk
3. change EvStack to use [], or List<>.
3.b. change all I/O to load into new format
3.c. OPs helper code need to be changed
4. fix broken plugins
5. zipped imagecache
6. optionally zipped main file

=> consider this to be part of OST 3.3, no version change needed

==== 

* dispXY should be like dispZ
* allow split of RMD
* lazy loading for the heaviest plugins
    * how automatic can this be?
    * should return metatype, not set name

=> OST 3.4