Provide fallback for usd-per-eth option when offline.

path centralized

Conflicts:
	parity/configuration.rs

Fixes #1073.

* execution error/result limiting

* missing trailing comma

* fix executive tests

* adding original error as string to the generic transaction error

* 'mallformed'-s all around

* adding options & cli flags

* adding it to the key deriving

* removed duplicated option

Update error message

Updating dapp-wallet

Fixed connecting to local nodes on startup

* moving deps to ethcore/hyper and bumping jsonrpc-http-server version

* Validate signature in tx queue

moving deps to ethcore/hyper and bumping jsonrpc-http-server version

Updating status page. Bringing back wallet

--geth IPC compatibility

Moving dependencies to ethcore & uniforming syntax libs through all crates

Conflicts:
	Cargo.lock

update hyper branch mio