clean up SupportedBrowser: add javadocs, rename variables
Generalize WebDriverFactory: extract any reference to the config aka TinafwPropLoader.

Also, some cleanups.
generalize PropertyLoader

make fine-grained loaders of properties,
chainable in a composite, as per client's needs.
fix/improve javadocs
fix WebUser#equals

Previously, it could loop on #equals(Object).
fix WebUser#closeBrowser: it should reset currentPage to null
add method WebUser#setCurrentPage to be used by unit tests
update WebUserTest: add/refactor tests
clean up WebTasks: get rid of the inner class BDD.
cleanup tasks: delete NullTask, replace it with an anonymous class in WebTasks
update WebTasksTest: refactor + add test for #nullTask
rename pkg utils to config
rename TinafwPropLoader to simply Config
improve ImLoggedInBase, NavigationWebTask
thow IllegalArgumentException, IllegalStateException where appropriate
fix raw types in WebUser
update README
bump version to 0.3.2
fix deploy.sh