DOODLE + RECYCLE BIN !

A new stable release, introducing two new useful features!

Changelog:

Added the recycle bin feature: deleted pages get shifted to a different location where the user can decide whether to restore some, delete some, or delete all.
Added the "doodle" feature: you can sketch a very simple monochromatic drawing by hand, and save it to a page as an image. The "paint" software is still very much in its infancy.
Bug fixes and improvements.