Removed commented-out legacy timer code
Added support for testFeedback/@access='during'

Needed a bit of refactoring to XSLT to support this,
and more will be needed later. Also added a sample for
testing this out.
Minor tweaks to Eclipse warn levels + fixes
WIP: multiple testParts & preConditions

This is a first sketch of support for multiple testParts,
and the evaluation of preConditions on them. It will need further
refinement. I've also added a new QtiCandidateStateException
for reporting state precondition failures and such-like; this
will be worked into the existing code as I complete the changes
to test navigation.