Conditional profile tests

An additional request from the Debian maintainer -- the copyrights in the files in the Tests/icc directory are not ours, and there's no license presented. He requested that the tests not fail without those files. I've replaced the icc file that we were using with a freely available and licensed version from ICC. However, it's unclear if the ICC license is ok for Debian, as it only allows verbatim copying, not modification. 

... The most famous of which, is "Don't get into a land war in Asia." Only slightly less well known is this: "Don't get into a licensing argument with Debian Legal" 

So:
* Removed unclearly licensed icc profiles
* Added ICC profiles
* Skipped them if they're not there. 
* Rewrote some of the tests to use the profile distributed with lcms, instead of the one we're shipping.