pep8, pyflakes
"Delete by Device/Token" has been tested
list registration codes
rename methods; inheritance for the wikid client (refactoring)
rewrote the method which sends messages
rename pywClient -> WikidClient
rename pywClient.py -> client.py
change the module name and the class name
update docs
create SUCCESS_STATUS (refactoring)
rewrite registerUsername
rewrite using of WikidClient
add tests for the wikid client