0.6.1

Bugfixes:

• Using the length option in traversal commands works properly now. Fixes #38.

• Command logging now works even if no cy commands have been issued. Fixes #37.

Misc:

• Removed cy proxy commands: each, map. These didn't really "fit" into the concept of a command, and with .invoke() or .its() they're accessible anyway, so nothing is really lost.