Sanity checks to the migratekde3 (commit 58823f36)

Darrell, I looked at the commit 58823f36, and I propose to adjust sanity checks so that instead of binaries existence check the existence of configuration file. For example: I had previously installed Krita => I have configuration. But at this moment I have not installed Chalk => configuration is not converted. When I install Chalk later, the configuration will be missing. In addition, testing tdeprint based on the /opt/trinity/include/tdeprint is not appropriate. I have installed package tdeprint-trinity, but /opt/trinity/include/tdeprint not exists. This is a part of package tdelibs-trinity-dev. Slavek --