Importing DrawKit v1.0b7 (2010/05/01)

Importing contents of DrawKit_src_beta7.zip from
http://apptree.net/drawkitmain.htm. The documentation has been moved
into /documentation and the core source code into /framework.

Expanding top-level licence to refer to DrawKit original licence and to
call out use of GPL licences in third party libraries.

It does not yet compile out of the box on Xcode 4.