Adapt to v0.8.0; application -> cluster
add commands for node operations
rename variables app -> cluster
remove size on container/cluster creation. Add cpushares, memory, and memoryswap
show cluster name in tutum cluster list
add node cluster list and inspect
add ability to list node cluster resources
add func to create nodecluster
add ability to remove a node cluster
add scale to nodecluster
change to use name to filter nodecluster
update version, requirements and registry address
bump version to 0.9.0pre
add ability to specify outer_port when run a container
refactor & add 1st test
add tests and fix issue on --debug option
add tests to parser, fix wrong naming
add tests for arg parsers
add tests for utils
refactor the tests