[Feature] - Line Angles

[HotDenim]

Can it be made so that when creating lines:

The 'angle' of the line is shown somewhere on the screen.
Lines can be drawn with a user pre-specified angle setting. E.g. 45 Degrees.
When Line is being drawn, it can be made to Snap to an Angle, e.g. 45, 90,, etc degreess. By both toggling a Interface option AND/OR holding down the SHIFT key.
When a Line is selected, its Angle can be modified using a values typed into the GUI, rather than visually with the mouse.