added xml rendering for PIC and refactoring of PIC context
renamed CustomInteraction.js renderers into PortableCustomInteraction.js
fixed PIC sample
added PortableElement renderer helper + PIC rendering ok
removed getAuthoringData()
added config.dom.getItemPropertyPanel()
added getElements() functions to mixin
fixed gridEditor test case libs
register ifo controls  on load
render portable info control widgets
added info control widget
Merge pull request #15 from oat-sa/student-tools

Student tools