Build as shared library

[frysztak]

Sorry I didn't make those changes before previous pull request.

[fallahn]

I'm having a think about this - there's not really a problem but the helpers and debugshape files are actually from a framework I maintain separately, and moving them here affects the file structure of the framework. Bad planning by me really, I'll look into reorganising my framework structure.

[frysztak]

Well, I realise it's kind of rude of me to just march in and reorganise your work. But the reason I did this is because I wanted to keep the package clean. Orignally, DebugShape.h and Helpers.h would be in /usr/include which is really ugly and out-of-place. I don't know if you ever intended your library to be packaged, but I find it very comfortable and more flexible.

[fallahn]

Not at all, the dependencies should be all kept together, I agree. Unfortunately I have other things which depend on these two files. Ideally I want to merge this - I just have to first work out how I'll break my Windows habits :)