Added keyboard editing of rotation and position based on an increment value assigned from some default and custom input value not exceeding 4 digits.  The keyboard arrow keys allow rotate and mesh movement in increments with the alt key allowing the third choice of x, y and z rotation and motion.  This only allows, at this time, edit of one mesh at a time.  If multiple messhes are selected, it will only effect the last selected mesh and I will change that to allow only one mesh to be selected while the key edit menu options are active.  This is a prelude to adding snap-to-grid and then vertex and edge editing and joins.