More updates to 1.3.0 version

 - Bump the version to 1.3.0
 - Python 3 updates for the message handler, and show messages if started
   with all warnings on, i.e.: python -W all
 - WK[TB][Reader|Writer] classes:
   - move properties to top, and more elegant handling of
     reader default options
   - add keyword **settings to __init__
   - limit setting unsupported (or misnamed) attributes
 - WKB [load|dump]s? now has a 'hex' argument (default: False) to
   read/write (load/dump) either a byte string or hex-encoded string
 - WK[TB] dumps? now have 'settings' keyword parameters, passed to writers