Introduced '@' after each annotation

Rendering changed: "annotation class" is now just "class" (with kotlin.annotation.annotation if it's kotlin annotation).

A swarm of tests fixed accordingly.

Sometimes it's allowed to parse "annotation" unescaped even if other annotations must be escaped.
A set of annotations and their options tests.
A swarm of existing tests fixed (mostly kotlin.annotation.annotation() added to txt-files).
STUB_VERSION increased. Some quick fixes slightly changed.

Reverts and fixes 102f0d34

Add newline to EOF, trim trailing spaces

Annotation with a parameter that is not stored doesn't make any sense