Correct name of generated file
Add erlxc:spawn/1,2
Use erlxc_drv:start(Name)

Since using the name with the port is mandatory, remove
erlxc_drv:start/0.
erlxc_cmd: emove unnecessary var
Throw an exeption on badarg
Correct the parameters to start/3
Add functions for stopping the container
Rename liblxc test module containers
Add tests for erlxc