Attempt to remove PCRE as a core dependency of the project.

[Robert Massaioli]

I happen to think that the RegEx's in the project are a hacky way to get some parsing done quickly but they are no substitute for the real thing. I would rather that libpcre was not a core dependency of fuppes and this issue is about making that happen. This is obviously not as important as a host of the other issues though and should be treated as such.

[Robert Massaioli]

Now that I look at it boost has RegEx built into it. We could totally use Boost RegEx as a replacement until we fix everything up.