added a date widget (using the jQuery UI date picker)
added integer value widget
Merge branch 'master' of https://github.com/dslmeinte/LWC2014

# By Angelo Hulshout
# Via Angelo Hulshout
* 'master' of https://github.com/dslmeinte/LWC2014:
  Added limited amount of css to make the questionnaire look nicer.
  Update after mail discussion - details and polisihing to be done.
  First attempt at scalability and teamwork description

Conflicts:
	reference-implementation/web/QL_allWidgets.html
	reference-implementation/web/QL_example.html
removed prepare script + corresponding doc