- add verbose switch
- improve host user environment integration (.bashrc, bash_history)
- automatic binding of development directories if they exist (/nfs,
  /tftpboot, /tftproot, /mirrors)

Tool is not only handy for yocto development, but in all cases
a command should be executed in a defined docker environment.

Therefore the tool is renamed to 'doksh' and reads an optional
config file 'doksh.cfg' with the parameters to use. So it is
possible to configure the tools and configurations you use for
several programming projects

Add /etc/passwd, /etc/shadow and /etc/group to container. This is required
for proper user handling in the container.
Otherwise things like the home directoy doesn't match with the host system