plugin:plugin for plotting/drawing mathematical equations
wheelEvent: detect horizontal
fixed duplication draftview icon
fixed previous commit
draw circle by 2 points and radius
updated circle2pr icon
added UI for circle radius
file cleanup
updated icon
updated circle2pr icon
circle2pr: updated error messages
Merge pull request #446 from dxli/dli

Dli: new feature: circle by radius and 2 points on circle
Merge pull request #426 from smallfix/plotplugin

plugin:plugin for plotting/drawing mathematical equations