MDL-14679 ok, here is the big patch with new dmllib and ddlib API, some code is already converted, XML db editor works; see tracker for details of regressions and TODOs

prevent NULL contents before field change (old servers can have this wrongly defined). MDL-14859 ; merged from 19_STABLE

MDL-14857 - Clean up summary table generation code at the top of the quiz review page - This is basically a merge of improvements we made at the OU.

Add facility to XMLDB editor to check for inconsistent field defaults.

MDL-14852 "improve sql in overview report for fetching question grades" moved all querying for question grades into main attempts sql query. AND MDL-14200 "Add group and course averages" some fixes for functionality to display question grades averages. Grade averages are not displayed when grading method is set to Average - as this cannot be done in sql and would be expensive to do in memory.

merged from 1.9 branch

MDL-14200 "Add group and course averages" fix for bug introduced in this patch. We are now using a seperate sql command to get the feedback text as we need to get it for the average rows too. Since it is not part of the sql to fetch attempt data we can't sort on Feedback anymore so removed the option from the table. Sorting by feedbacktext is not really useful anyway, users are more likely to want to sort by grade.

Merged from 1.9 branch.

MDL-14200 "Add group and course averages" added extra rows to the end of the table in quiz overview report also MDL-14187 "Improve tablelib - improve api and add functionality to download table contents in a variety of formats - XLS, ODS and CSV" implemented the first of my proposals for improving tablelib. Added a extra method to use keyed arrays to add a row to a table. Seems obvious that this is an improvement to tablelib and it is an addition to the API so won't affect existing code.

Merged from 1.9 branch.

MDL-14844 "Quiz Report: Bar Graph doesn't displayed maximum grade" added perfect grade to last  'band' on graph.

 a response.
New option site_after_submit to define the url of the continue-button after completing
 a feedback

MDL-14442: apply addslashes() before importing values, to allow quotes in field's values. Merged from MOODLE_19_STABLE

Merged from 1.9 branch.

Adding a missing string for print_error('errortoomanylogins'); in update_login_count() of lib/moodlelib.php. - amendment for previous commit.

Adding a missing string for print_error('errortoomanylogins'); in update_login_count() of lib/moodlelib.php.

MDL-14822 "Quiz Report: the quiz report do not find the first attempt" needed to include quiz id in WHERE conditions.

merged from 1.9 branch.