Change computation of bounds for window/level (handle negative values)
Change composite param to use QHash to set values (was buggy before)
Remove useless qdebugs
Solves the problem of window level using the sliders with images having small value ranges
Window limited to 0 everywhere
Correct number of decimals shown based on current step
Correct WL transmission bug between 3d and 2d view
Correct zooming bug in 3d mode
Levels are not constrained by image values anymore
Merge pull request #157 from ocommowi/wl-composite-bug-correction

WL composite bug correction
Add four view split button to navigator
Add specific parameter for image splitting in 4
Remove link on orientation
Add data list parameter
Add datalist parameter to synchronize image drag/drop, not great
Data list parameter is now on data indexes
Add nicer icon for split view mode
Change MPR mode in 3d view to MSR to avoid confusion with new MPR mode
Move medGui into medCore, move MPR mode in the view itself
Remove warnings in GDCM reader