Fix dropped change output when entering a comma into the amount

Thanks to Reddit user murbul: http://www.reddit.com/r/Bitcoin/comments/2bat5y/coinpocket_06btc_tx_fee_bug_can_anyone_reproduce/cj3lko5

This version also allows you to sweep private keys with unconfirmed transactions.

Checksums

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Commits

9441c61 Fix spec
9b9d9f4 Version bump
ad2312b Fix regex to not allow commas
e93cf28 Merge pull request #38 from intelliot/master
91cbdd4 Allow sweeping private keys with unconfirmed transactions
f136cfb Update README.md