Revert "temperature: kelvin is high, introduce kludge factor"

This reverts commit 0ef76b617f7552bdca5ea3d7291d1fe7f3d6ffc5.

it's kind of needed for the 1.1.x series because reload_defaults() is called before module->gui_data is inited, which
results in an estimated daylight whitebalance of (1,1,1) in that branch. master has fixed that some time ago,
so the values make sense without kludging (yay :) )
wb_presets: sony nex-5r (stolen from ufraw)
(cherry picked from commit d29bb85f7e79138d54a59fa3714e8c2d2fe61ad6)
Button to select between to split view or overlay
Create snapshots table and add a snapshot number column to images table
Several snapshots history and name saving

 + Write snapshot's history to xmp (TO BE FIXED)
 + Write snapshot's history to db
 + Write snapshot's name to db
TODO: we also need to read snapshots info from xmp file
Small modification in colums name in snapshots table
Make sure the functions are defined before using them
Create snapshots table and update history one in existing db
Read all the snapshots information from the db and store it in the sidecar
Fix several compile errors
Read snapshots' history from XMP sidecar files
Write the snapshot history to the db when it is taken
Init the GUI with the snapshots stored in the db
Show in the UI the snapshots taken.
Pass the right number of columns in all history table invocations
Framework to allow modules to stop calling main expose() and take its control
Add a new button for each snapshot
Use the proper callback and number the snapshots consistently
update copyright notice