UrlParam deprecated in favor of UrlParamCodec

UrlParam combined two features: i) encode/decode URL parameters and ii) keep a value of a URL parameter. In practical use, this felt somehow clumsy, so I removed (ii) and called the result UrlParamCodec. Methods of the previous one that used the stored value, now have a value parameter. Seems to work much nicer in practical use.

Better support for subclassing of HTML subtrees

Introduced an intermediate abstract class to allow for easier definition of special purpose HTML objects.

translator added

Added a very simple Translator to translate text while creating an HtmlText element. Fixed minor typos. Added modified style for javadoc.

first release

Initially publishing.