Fixes and more fixes

Patches

• pm:drawend is now fired for Markers too - Fix #182: 3d82cce
• Used setLatlngs to update Lines and Polygons. Fixes #181: b1dfa55
• Bounds are now correctly updated after editing a polygon: a4b094f
• Added circle toolbar option: e9f19ff
• Snap events aren't firing like a minigun anymore - Fix #185: f6f195a