ClamAv# cleanup

I've just severely cleaned up my ClamAv# source code and finally put it in a proper namespace...

Something else that seriously needed to be done was splitting up the source code into several logical files, instead of one big gunk of code... I've moved all exceptions into a seperate file, also the demonstration application now has it's own file.

So I'm basically moving from a proof-of-concept towards something which could be mistaken for a serious project.

Also I'm waiting for approval from sourceforge.net to get my own project page for ClamAv#.