* 15.06:
Bump version to 15.05.95
Update changelog
Hide the bed temperature for UMO
Do not hide the entire material category for UM2 but just the unused settings
Add a precision value to the time/quality slider settings and use that to round values
Display the rotation angle when we are performing a rotation
bugfix: avoid overlapping walls OFF by default
Add a background to the tooltip label so long strings also have background
Make sure the tool panel background is at least as wide as the active item
* 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
