* cmd/swarm: don't require bzzaccount flag
* docker: remove setup script because bzzaccount is not required anymore
* cmd/swarm: manage account creation/selection when bzzflag is not defined
* cmd/swarm: no bzzaccount flag tests
* cmd/swarm: use random network ports on tests
* cmd/swarm: fix typo
* cmd/swarm: add --bzzkeyhex flag
* cmd/swarm: use different ipc paths for tests
* readme: update example on how to run swarm
* cmd/swarm: rename getAccount -> getOrCreateAccount
* cmd/swarm: remove unneeded comment
* cmd/swarm: use shorter ipc path for test
