DApps generated with `new --simple` don't have a blockchain config so ensure
that the blockchain proxy and listener (dev_txs) use appropriate provider
settings when setting up web3.
Without these changes, in a fresh `embark new --simple` project the `embark
blockchain` command will encounter unhandled promise rejection with respect to
the proxy; `embark run` will encounter similar with respect to dev_txs.
Add support for ability to start and stop IPFS via command `service ipfs on/off`.
Add support for `ProcessState.Errored` process state in the `ProcessManager`. This allows for processes being launched and stopped to trigger an error and the resulting process will be in an errored state. Processes in errored states can still attempt to be started and stopped.
`service ipfs on` - starts an IPFS node if not already started. Shows an error if the node is already starting or started.
`service ipfs off` - kills the running IPFS node as long as Embark has started the IPFS process. If the IPFS process was started externally, an error is shown.
return early
