moved most code to old-dwa to make place new version

The new version, dewi, will be installed by setup.py, uses standard codes
.gitignode: updated for DEWI
Added Makefile, sample test
added pep8 & pylint validation
wrap unittest.TestCase, use lowercased assertion methods
Makefile: added check (tests + cs) and help targets
dewi: add core module, and dwa.core.commandregistry