Add simulator submodule.

To test code which uses batchelor without actually submitting any jobs to any
batch system, add a simulator module which provides the same commands and
interface and will keep track of submitted jobs and so on without actually
doing anything. Jobs submitted to the simulator have a life time which can be
set in the config file for which they are shown as running and after which they
are deleted.
Fix bug in C2PAP submodule.

Fix a bug in the C2PAP submodule: two lines which should have been there have
been forgotten for some reason, should be ok now.
Merge pull request #13 from legordian/master

Add simulator submodule.