Switching from 'odin32ex' GitHub repo to 'odin32-swt' branch at Netlabs

To have more control over the things required at the Odin32 front,
a temporary 'swt' branch has been created in the Odin32 repository
at Netlabs. See: http://trac.netlabs.org/odin32/browser/branches/swt

You can checkout this branch with the command:
svn co http://svn.netlabs.org/repos/odin32/branches/swt odin32-swt

From this commit onwards, this 'odin32-swt' branch will serve as the
Odin32 component for SWT-OS2. Every commit for SWT-OS2 will be against
a specific changeset for the 'odin32-swt' branch of which the link will
be provided in the commit message.

At some point in the future, the changes from this 'odin32-swt' branch
will be reviewed by the Odin32 maintainers and merged to 'trunk'.

For the sake of completeness, we'll do a short replay of the header
stuff, this time against the 'odin32-swt' branch. At this point the
missing header files have been added to the 'odin32-swt' branch, but
no other modifications have been made.