Fix example for SQL format preconditions. (Should be colons, not equals)
Fix mangled formatting on the preconditions page, from "sequenceExists" down.
(A closing tag was missing its last angle bracket)
Fix bullet points not being rendered correctly on changelog_parameters.md.
(Needs an empty line before the bullet points start)
Fix invalid emphasis syntax in update.md. Replace it with backticks, since they
reference technical names.
Fixes to changeset.md. Fix links in tables, bold a "since", grammar fix.
Merge pull request #28 from laurence-myers/master

Fix SQL preconditions example, misc formatting