Partial TCP, Timers, Virtualbox +++

• Partial TCP - enough to show a static webpage
• Asynchronous timers using the PIT (Polite ones - no context switches). You'll find them in "class_pit.hpp".
• Major directory structure cleanup, mostly split contents in ./src into folders.
• Lots of work towards IPv6
• VirtualBox support is back - but note, ARP is not done, so don't expect proper networking.
• Install-script finally works - way differently
  • We now install to - and build from $HOME/IncludeOS_install. Much better than installing by default to /usr/local/IncludeOS/. You can move that folder anywhere - just update the first line in the makefiles. (Yes, environment vars are probably what we'll do later, but we're also getting a package manager...)
  • The contents of the install-folder gets gzipped into a binary release bundle. This bundle can be extracted as-is, and there you have everything you need to build IncludeOS (except for local dependencies such as clang). No need to build a cross-compiler!