Nicola Chiapolini authored Jul 17, 2019 and Carsten Rose committed Jul 17, 2019

  * Add Twig Extension to parse QFQ Links
  * Pass assoc-array of query result as context
  * allow to pass template as string

Fix undefined index. Refactor functions.sql to function.sql. Inplement constants for Version numbers.

Database.php, DatabaseUpdate.php: implement 'specificMessage' in prepareExecute().

Introduce new config var 'DB_UPDATE' in config.qfq.ini. Update the handling, if there exist table 'form' and 'Form'.
Manual.rst:  document the new config option DB_UPDATE.
Database.php: Typo fixed.
DatabaseUpdate.php: Iterate over all found 'Form' tables, take the newest version number. Respect config option DB_UPDATE. Fixed a problem: if in the PHP DB updates a newer DB Version is configured than the PHP source itself is, such updates are now not played anymore.
Config.php, QuickFormQuery.php, config.example.ini: handle config setting DB_UPDATE.

Fixed: unnecessary exception if there is no Form / FormElement table
Database.php: New function playSqlFile().
DatabaseUpdate.php: missing table Form won't throw an exception anymore.
Manual.rst: note that formEditor.sql will be played automatically.

Also respect version numbers which are not configured in DatabaseUpdateData.php and between two configured version numbers.

For updates of QFQ prior to 0.17.0, do:   ALTER TABLE  `Form` COMMENT =  'Version=<your old QFQ version>'
DatabaseUpdate.php, DatabaseUpdateData.php: new class.
QuickFormQuery.php: Add DB UpdateCheck
Database.php: moved to new subdirectory `database`. Add 'ALTER' as a new SQL command.
FormAction.php, TypeAhead.php, Report.php, Sendmail.php, FillStoreForm.php, Store.php, AbstractBuild.php, Delete.php, Evaluate.php: Update path to Database.php.