pre-command and post-command will always be executed before and after
any command is being executed. This does not affect inner calls.

Use rm -r instead of rmdir as the directory will _never_ be empty

Add mr's vcsh lib to docs

* Make include more resilient (Thanks to Thomas Koch)
* Fix emphasis issues with underscores in variable names in MarkDown

Thanks to Brain May for pointing this out.

fixes #22

Thanks to Brian May for reporting this.

fix #22

Add hooks for setup()

* Fix and expand manpage
* Use explicit variable names in hook()

Thanks to Vincent Demeester for this idea.

One to go and that may just move to github issues...

Thanks to David Bremner for reporting this