improved Makefile.  knows version, better help.
README updates and reformatting for clarity.
test/utils.js for reused testing utilities
(muddy!) add 'microlog' function.  (and onBlocked)

warning: tangles a few `resolve` fixes.
Fuller check of indexeddb promises.  fix #15 fix #16

* `resolve` on event store re-checked by (glind)
* more tests:
  - empty/uncreated db clear works
  - upload checked with async-server
* intermittent permformance test failures disapper (re #16)