mbs-6651: adding has_dates column to the SQL
mbs-6651: form changes for dates in rels
mbs-6651: don't show dates on docs for rels without them
mbs-6651: making the rel editor look at has_dates
mbs-6651: disable and hide date fields for rels without dates
mbs-6651: disable submission of dates from the rel editor for dateless reltypes
mbs-6651: adding trigger to check if dates are allowed
mbs-6651: remove needless newline
mbs-6651: include update file I forgot to git add earlier...
mbs-6651: adding trigger to upgrade.sh
mbs-6651: small changes at Ian's request
Merge branch 'schema-change-2014-05' into mbs-6651

Conflicts:
	upgrade.sh
Fix indentation in upgrade.sh
Remember dates when switching between types in the relationship editor dialog
Merge branch 'schema-change-2014-05' of https://bitbucket.org/metabrainz/musicbrainz-server into mbs-6651

Conflicts:
	upgrade.sh
Merge remote-tracking branch 'reosarevok/mbs-6651' into schema-change-2014-05

* reosarevok/mbs-6651:
  Remember dates when switching between types in the relationship editor dialog
  Fix indentation in upgrade.sh
  mbs-6651: small changes at Ian's request
  mbs-6651: adding trigger to upgrade.sh
  mbs-6651: include update file I forgot to git add earlier...
  mbs-6651: remove needless newline
  mbs-6651: adding trigger to check if dates are allowed
  mbs-6651: disable submission of dates from the rel editor for dateless reltypes
  mbs-6651: disable and hide date fields for rels without dates
  mbs-6651: making the rel editor look at has_dates
  mbs-6651: don't show dates on docs for rels without them
  mbs-6651: form changes for dates in rels
  mbs-6651: adding has_dates column to the SQL
Fix ordering of upgrade.sh.