Merge branch 'upstream'

* upstream:
  Fixed CSRF token masking issue.
  improved error message of calling invalid scope method.
  Fixed repo URL
  Fixes #1650: Added Connection::pdoClass.
  code style fix.
  added changelog
  codestyle fix
  improved checkIntegrity method
  Modified extension guidlines
  fix sphinx command signature
  fixed bug with forgotten param, fixed behavior for one table integrity
  fixed sequence reset
  added postgresql features to reset seq/check integrity
Merge remote-tracking branch 'origin/master' into 46-image-helper

* origin/master:
added frame method