x/y from XSizeHints are obsolete (and have been for a long time), so
instead use x/y from XWindowAttributes when USPosition|PPosition are
set.
The only reason we need to keep XSizeHints in our client_ctx is for
flags, so just add one to hints; consolidates sizehints and shrinks.
Additionally don't abuse PSize for XGetWMNormalHints() failures.
Initial commit
Ignore build droppings.
Initial working Linux build.

I've added GNUmakefile rather modify Makefile to simplify future
merges.  GNU Make prefers files named GNUmakefile to ones named
Makefile so no additional command line arguments are necessary
when building on Linux with GNU Make.
Add cvs-authors file used for initial import.

Be sure to copy this file to .git/cvs-authors before running
git-cvsimport.  When new users commit changes upstream this file
will need to be manually updated before running git-cvsimport.
Document recommended way to sync with upstream.
Sort cvs-authors by username.
Fix copy-pasto in user's last name.
Sync copyright header with upstream.
Sync with latest upstream changes.

Merge branch 'linux-port'