ISCtrl: relaxed preconds on touchDuration()
Minor javadoc improvement to ISCtrl
Added "touch durations" to TSCtrl
Simplified TIRendRequest slightly.

Now passed an EffectiveItemSessionControl instead of individual
parametetrs. The XSLT is expected to do the required logic for this.
WIP: Big refactoring of rendering now compiles...
Tidied up and fixed latest refactoring work