Update History.md
Fix JSDoc template
Version bump for rc.6
Update contributors for 0.9.4
Update license file.
Allow `null` in appId check. This can happen when a client passes
`undefined` for appId and it gets translated to `null` by DDP.
Hide spurious message that pops up sometimes. Users don't need to see
this "everything is OK" message. (Especially since sometime we sync right
after printing it!)
Bump versions for -rc.7
Re-order and linewrap History entries. No content changes.
Rewording pass over History.md
Work towards fixing the "do-not-update-to-rcs" self-test.

The test was failing because it was written to run against the real
local warehouse, instead of a stubbed one. When initializing the
Sandbox with an explicit warehouse, the test failed because of
incorrect logic piping the right path to the packages database
(in this case "test-packages.data.db" instead of "packages.data.db").

Unfortunately, the test still fails -- this time potentially due to a bug:
After publishing the package for the first time with `--create`,
the next step tries to update but gets the following error:
    There is no package named test:i1iyhj. If you are creating a
    new package, use the --create flag.
Revert "Work towards fixing the "do-not-update-to-rcs" self-test."

This reverts commit 89b394d9744a6b6399b469c2801dee73264f4626.

I cherry-picked the change onto devel, since this change isn't
even supposed to change the behavior of the tool. Why risk
it just before the release? Thanks @nim for the suggestion.
Update todos
Update banner.json
Add 0.9.4 heading to History
Specify defaults for --mobile-server
Bump rc version
Bump package versions for rc.8
fix make-bootstrap-tarballs for sqlite world
Fix banner indentation