[Bf-codereview] Wireframe drawing for editmode (issue 6202058)

[NicholasBishop at gmail.com]

Reviewers: bf-codereview_blender.org,

Description:
Small patch for drawing wireframe overlay in editmode. Uses the same
"wire" drawing option as object mode.

Example:
http://nicholasbishop.net/wordpress/wp-content/uploads/2012/04/wire-overlay.png

Please review this at http://codereview.appspot.com/6202058/