Add lib repo
Revert "Add lib repo"

This reverts commit a6f88603fe85d925d01f156526a7ed54cbdd7bc1.
Add lib repo
fix #16,#15,#11.  worked on #13
undo implementation attempt
.obj reference in Gvert, Gedge and Polystrips caused deepcopy problems.

Removed problem by creating reference to name
improved grab tool movement. does not draw brush when grab,scale,rot

grab tool is now wrt screen space.  note: the positions do not update if
they project off of the object.
generalized new grab tool code
short polystrips never got n_quads calculated due to early return.
debugging
Merge branch 'dev' of github.com:CGCookie/retopology-polystrips into dev
worked on #5, #8, #10

now handles self-intersecting strokes, including circles and figure 8s.
heavily improved strip intersection checking, but needs more testing.
fixed strokes always splitting at least once
edit mode handling.  Allows retopo multiple retopo sessions (even on different original form

objects) to always push new generated geom into same retopo object
Merge branch 'dev' into feature/editmode
Merge branch 'dev' into feature/undo

Conflicts:
	__init__.py
	polystrips.py
attempted to kill jitter. cleaned code and added comments
added del/dissolve gv/ge command.  improved stroke into gedge code
fixed #23
added prefs option #23