* Previous subtree caused a lot of trouble
* Implemented sha3 in our shiny new http JSON RPC

git-subtree-dir: cmd/mist/assets/ext/ethereum.js
git-subtree-mainline: f80fe977
git-subtree-split: 63d9c070

Merge branch 'key_store_and_accounts_integration' of https://github.com/Gustav-Simonsson/go-ethereum into Gustav-Simonsson-key_store_and_accounts_integration

Now using git instead of mercurial

* Use crypto.Sign instead of directly calling secp256k1 lib
* Rename UserAccount to Account and Addr to Address (for consistency)
* Change AccountManager.Sign to take ptr to Account instead of
  address byte array
* Simplify copying of Accounts in Accounts()
* PubkeyToAddress and GetEntropyCSPRNG now exported