Add a "isRunning" metadata flag

to catch bad shutdowns
Detect database corruption of blocks and txns

Compare the hash of the object with the hash its saved under, to see if it correlates
Detect database corruption at chain top
Change to cryptocoinjs base58 library

Hopefully less memory-leaky than the CC version
Cryptocoin repository name change
Switch to JS ECDSA implementation

cryptocoinjs' eckey library
Add convenience function for getting chainHeight
Reset levelDB parameters to defaults