FIX #30 : Collage mode activated

I made my best to make this mode stable to general use, but there is
a still a lot to test and fix.
FIX: Zero_geometry broken: +
FIX: Label truncated if spaces present
FIX: Allow zero geometry and concatenation to set size limit
only on one dimension wid or height
Quick FIX: If no concatenation or zero_geometry conform to square

Warning: This uses the value 1500 as check, so if the user set 1500
as input, the script will overwrite.
FIX: sometimes zero geometry produces white space. We add trim at the
end of montage when using any special mode.
FIX: Error message if value padding or border was erased

We add a check when setting value, to always return 0
FIX: Trim collage if zero_geometry or concatenate mode used
Added png32 to output format in montage
FIX: range wont update if keyboard used to set col and row
    this cause the progress bar to report wrong calculations

We have to use trim in convert phase, as montage uses trim on
read in images and not in result.
FIX: Alfa replace color selection broken
ADD collage settings to artscirpt settings and modified default preset

Strips v and horizontal modified to use zero geometry and no spacing
ADD: Simple rename capabilities
FIX #37: Simple rename, using preffix suffix.

New suffix: File modification time
ADD Collage Crop mode.
FIX: Concatenate mode does not use image size.

Remove read in size when concatenate mode on.
FIX #17 : Add resize operators and the hability to grow

There is still some optimizations to do and better quality testing
on growing.
Version Bump to reflect add of resize operators
FIX: Add position to Resize Zoom mode.
FIX: Do not show collage unsupported output options if mode on
FIX #38: Keep GUI alive in long running calculations.

All settings can be modified while it is processing and the button
convert adds the new settings to the cue
Small code fixes
ADD: Image watermark selection on GUI