cmd: s/rowList/rowSlice/
cmd: merge "target" and "target-list" commands

Now we have just target.

Related to #356.
misc/bash-completion.d: remove target-list from tsuru file
cmd/crane, cmd/tsuru: update target related documentation

Related to #356.
misc/bash-completion.d: remove target-list command from crane

Closes #356.
cmd/tsuru: version 0.7
cmd/crane: version 0.4