refactor tests in terms of dztest
Factor 01 test into 3 smaller tests
Add very experimental quickrefs
remove unused readonly stuff
Corpus can be ignored now
remove unused images, this is the wrong place for them
Up version a bit, these are sizable changes, but just not in user code
v2.000010

 [Code]
 - Remove unused Readonly stuff.

 [Dependencies::Stats]
 - Dependencies changed since 2.000003, see misc/*.deps* for details
 - develop: +1 ↑1 (suggests: ↑2)
 - runtime: -1
 - test: +1 ↑1

 [Documentation]
 - Add very experimental QUICK REFERENCE sections.

 [Tests]
 - reimplemented in terms of my newish tester util
 - some tests split into smaller tests.
post-release cleanup