Crossed the last TODO items, now waiting for the remaining bugs until…

… it's merged in master

cache + zl per icao + decal per zl

Rebased and cleaned up the branch, moving to the official repository

Progressive ZL now (almost) fully integrated in the GUI

Now polishing and bugfixing

Started the GUI integration : new Progressive mode and related options

Fully usable, but only from batch mode, plus a hack to display the zo…

…nes in the Preview window

Copy of original Dropbox files

Merged branch hotfixes/config into hacks/norway-source