Virtual files

[solidstate1991]

While working on a lot of enhancements for emesx'es tga library 
(almost a rewrite), I was thinking on implementing a way for 
handling memory locations as files, which would make handling 
archives mush easier, since I wouldn't have to write a separate 
overload (or more) for loading files from memory every time I 
need access to a new type.

I'm thinking on making a library for it. Let me know if you want 
to add any additional functions. I'll making it under the Boost 
license, and also planning to add better binary writing and 
reading capabilities (e.g. direct reading and writing of simple 
types and certain structs).