0.3.1

• Added consisten read option
• Fixed timeout parameter in read()
• Added atomic delete parameter support
• Fixed delete behaviour
• Added update method that allows atomic updated on results
• Fixed checks on write()
• Added leaves generator to EtcdResult and get_subtree for recursive fetch
• Added etcd_index to EtcdResult
• Changed ethernal -> eternal
• Updated urllib3 & pyOpenSSL libraries
• Several performance fixes
• Better parsing of etcd_index and raft_index
• Removed duplicated tests
• Added several integration and unit tests
• Use etcd v0.3.0 in travis
• Execute test using python setup.py test and nose