Mock alternative names to log methods and (un)escape

Fixes #14.

Thanks to @msmark for the report and reference implementations.
awesome. that brings the number of implementations for `unescape` to 3, the others being in `CCM/src/main/perl/Element.pm` and `ncm-ncd/src/main/perl/Component.pm`. (at least the code seems to be the same copy/paste, including lack of unittests...)
i understand the chicken and egg issue, but maybe add a comment where you copy/pasted it from? if you can propose a proper location (like `CAF` to add these common functions, i'll be more then happy cleaning up the mess a bit and at least veryifying the implementations. it seems unavoidable to have it don twice (once in the test framework, once elsewhere), but the results should be checked to give the same and correct results imho)