WIP since initial review - squash 7 commits
Allow import funcs to work in watching-only mode.
Add initial tests.
IMPORT PATH MODIFICATION CHANGESET
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Please use this changeset as the first one on top of the conformal codebase.
Note that if there are new imports, they need to be changed as part of this
changeset. In general, use "git rebase" on github.com/conformal's version
and apply this changeset first.
Squash 24 changesets.

Implement voting pools deposit side.
Add restrictions to replace and create series

The minimum number of public keys is now three and the number of
required signatures must be less than the number of public keys
Fix teknico's code review comment