Add verb forms related to recursion (recurse, recursed, recurses, recursing)

[corywright]

• http://en.wiktionary.org/wiki/recurse
• http://en.wiktionary.org/wiki/recursed
• http://en.wiktionary.org/wiki/recurses
• http://en.wiktionary.org/wiki/recursing
• http://dictionary.reference.com/browse/recurse

[lorenbrichter]

Normally wiktionary is iffy, but I approve of these words :)