* 15.06:
Bump version to 15.05.93
Add a changelog file
add missing width and height to section icon
add missing color to tool_button
add setting for sidebar background color
Make cura_app executable
Move Sidebar so it is on top of everything else
Do not slice if there is any setting with an error value
Start adding some more proper error/warning values to settings
Position the setting tooltip to the left of the settings instead of below
Set version to 15.05.92