[#381] Stop convert_from_extras() putting extra quotes around strings

Currently there are tests broken because of this, but they look like
just outdated asserts that are expecting to see the extra quotes.
#381 migrate db and get rid of all convert to extras calls
#381 fix sqlite errors
#381 add control charactors to migration
#381 make control charicter use x style escaping
#381 make double backslash at end of replace
#381 use python to do the dumping
381 merge conflicts master
Merge branch 'master' into 381-convert-from-extras-quoting
Merge branch '381-convert-from-extras-quoting'