Merge pull request #127 from kamalpreetgrewal/master

implements select entity option and sets cursor shape
implements Delete_Selected menu item
code cleanup
Merge pull request #130 from bhattigurjot/master

implements Delete_Selected menu item
Arc using three points
Merge pull request #131 from CharuChopra84/master

Arc using three points
adds 3pArc icon and corrects some code
Merge pull request #132 from bhattigurjot/master

adds 3pArc icon and corrects some code