upgrade OWTHERM to 3.23
Merge OWTHERM version 3.23

Conflicts:
	fhem/FHEM/00_OWX.pm
	fhem/FHEM/11_OWX_SER.pm

git-svn-id: http://medialab-karlsruhe.dyndns.org/repos/FHEM/branches/async@290 9855b078-7087-11e0-8b26-2f3a526cf534
adjust owx_version (4.5 for OWX and 4.0 for OWTHERM)

git-svn-id: http://medialab-karlsruhe.dyndns.org/repos/FHEM/branches/async@291 9855b078-7087-11e0-8b26-2f3a526cf534
Merge branch 'async_local' into refactoring_async