Merge pull request #45 from Chris00/master

Simplify the `Omd` interface.
version 0.7.0
refix for #52

* "undo" a087de85e7e62cacbeb96e2763ed905a0016448a
* more general fix (previous one was not done in the right place)
minor change (in debug mode)
Typo.
Add an option to specify a default language for code.