It would be nice if upstart users could also make use of the lxc_conf parameter.
params must come before image and command.
Support exec driver option.
Use udef as default for execdriver because the -e option is not supported on all docker versions.
cleanup spaces
Added tests for execdriver option.
Added test for lxc_conf parameter
Merge pull request #49 from specialunderwear/lxc_conf_upstart

It would be nice if upstart users could also make use of the lxc_conf pa...