BREAKING CHANGE: `types.Cmd` was moved to `exec.Cmd` and the `Private` field from the struct was removed. The filed `Trace` is now a bool field instead of a bool pointer, and the helper method `SetTrace` was also removed.
BREAKING CHANGE: The method `trace.Cmd` was removed, please use the `Trace` field of `exec.Cmd`.
I have split the code into various files and beside that I have also
used more flat package structure. I have removed the whole constants for
flag names and environment variables, since nobody got to write these
flags manually anyway as all these variables are assigned to structs
all can benefit form code completion while this lib stays more readable.
Signed-off-by: Thomas Boerger <thomas@webhippie.de>
