online-exam-answer.wf

- new assessment workflow for in-class exam
lib/inclass-exam-answer.wf
lib/inclass-exam.wf

- Defined common superclass for Assessments (AssessmentInterface) to
provide common infrastucture (assertion methods), and define other
interface classes as subclasses (Renaming_form_loader,
Answer_manager, Question_manager).

- extended message keys
- new prototype pages:
www/prototypes/TestItemMC.form.page
www/prototypes/TestItemSC.form.page
www/prototypes/TestItemShortText.form.page
www/prototypes/TestItemText.form.page
www/prototypes/TestItemUpload.form.page
www/prototypes/assessment-index.page
www/prototypes/inclass-exam.wf.page
www/prototypes/inclass-quiz.wf.page
www/prototypes/online-exam.wf.page
www/prototypes/quiz-select_question.form.page
www/prototypes/select_question.form.page

- Defined to following pages as site-wide:

Package site_wide_pages {
Workflow.form

TestItemText.form
TestItemShortText.form
TestItemMC.form
TestItemSC.form
TestItemUpload.form

online-exam.wf
inclass-quiz.wf
inclass-exam.wf

quiz-select_question.form
select_question.form
}

- Ensure availability of site-wide pages at startup
of server.


- bumped version number to 5.10.0d15