Added AnonCoin.
Bug fix affecting coinbase tx pages.
Added X11/Hirocoin support
Note new way to extract genesis tx.
calculate_target: Avoid "ValueError: negative shift count" on very low difficulty.
Needed VARCHAR instead of CHAR to support 3 and 4 character coin codes, and added Hirocoin policy.
Merge pull request #91 from n00bsys0p/x11-hiro

Added X11/Hirocoin support
Merge branch 'master' of github.com:bitcoin-abe/bitcoin-abe into small
export_tx works for format="api"