Files without md5 hashes are hinky

*Analysis*
Let's not say exactly why, but some files are locked such that even root can't read them. These files are suspicious and usually highly related to what's wrong on the box. If a file doesn't have an ```md5``` hash, RelatedFiles filter will now consider it as related to the problem.

*osxcollector*
Add logs from ```/Library/Logs``` to the output bundle.
Add the ```message``` from exceptions to the output.
A couple of small bug fixes.