Allow storing a pre-hashed admin password

When duplicating a couch, it is difficult to copy the _config/admins/*
values. Storing the encoded value does not work because that value is
re-hashed when stored. (Your password is the literal string
"-pbkdf2-abcdef...".)

This change will store any config setting unmodified if ?raw=true is
in the query string.

Updating _config/admins/* already requires admin privileges, so there is
no change to the security.
Move myself from THANKS to AUTHORS
Add documentation on replication

Previously replication.rst described only the _replicator database, but did
not provide an overall view on replication.
Create/edit and query views.

It is now also possible to preview views with pouch. Issue #1806
Add design doc metadata to view
Fixes issue #1816
Show view request duration amd goto doc id

This is for issues #1812 and #1810.
Fauxton wrap codemirror errors in try catch.