input vortons/vortex
cleaned language on conservation of winding number
Added equation for the field as a function of space.
Added r dependence in phi equation, clarified that r->infty still counts.
Winding number n -> w
Removed the restriction that the region must contain the origin.
Illustrated that the vev must vanish by example, rather then giving a formal proof.
Added that w needs to be the same all along the vortex.
Testing new textmate macro with a newline insertion.
Added personalized \eqref.
Added many commands analogous to \eqref.