changed format.difflink to format.url.version
changed css class `diff-version` to `api-version`
class tree generated from diffs;

displays which version a class was added or removed;
dumps with missing data (superclasses, enums) are repaired instead of ignored
removed obsolete code
switch order of diffs
added and switched to flattened diff dump
added version numbers to members
refactored version history into list form;

removed tag column in member lists;
displayed version history of class on class page;
displayed version history of members in description section
file names are URL encoded
fixed wrong version on diff message
added LoadingGui as a superclass repair exception