Updates
* Equator
* make parameters persistent ignoring the existing cache
* add spinbox to show the value of R-min
* write logs to record changes of user-editable variable values
* add new summary format to allow the result of one image to be shown in on one row
* Quadrant Folding
* solve the truncation problem
* add checkbox to allow R-min to be persistent
* Projection Trace
* make boxes draggable after creating
* Scanning Diffraction
* add checkbox to allow log scale colormap
* add checkbox to allow 90° rotation on arrows and ellipses
* do not render positions where the intensity is invalid instead of rendering them as 0 intensity
* add color bar
* show axes
* add RBF interpolation mode to show the intensity map smoothly
* add alpha blending mode to allow displaying map in different beam sizes
* add ROI feature
* Other
* add exception handler for Mac App Buddle
* prevent ccp13 from writing log in the working directory
* fix some bugs to allow program working on both Qt4 and Qt5, python 2 and python 3
* support .smv files