accept unicode on task names and docs.
added command `dumpdb`
added Action class `tools.SaveOutput`
BACKWARD INCOMPATIBLE `getargs` for a group task gets a dict where
  each key is the name of subtasks (previously it was a list).
remove SaveOutput. added this functionality to CmdAction.
`CmdAction` support for callable that returns a command string
CmdAction callable can be a tuple.
small fix
added command `strace`
small speed optimization on startup
oops
small fix
coverage for code using multiprocessing
tests for strace
auto, started major re-write (work-in-progress)
new auto - part2
auto. find_dep_files
auto. check for changes while running
strace - show only files in subfolder b default.
fix dbm support for unicode keys in python2