Note to self: commit more often.
Added AbstractAdapter and first implementation (TagCloud).
Added client UrlBuilder.
Added first Data classes (value objects).
Set up DIC for tests statically, so that it has to be done only once.
Removed UTF-16 tests, because supporting non-ASCII-superset encodings causes more problems then we can deal with at the moment.
Added instanceof functionality to Loader.
Encoding converters can now deal with Parameter objects.
Parameters can construct themselves from query strings.
Switched to RFC3986-compatible URL en-/decoding.