400: Horizontal indents and spacing different for all MC Questions

Jira: BRIX-400
319: Add a demo book page for Drag And Drop Question

Jira: BRIX-319
28: Adding Pixel Circle to the sketch tests page of demo book

pixelcircle shape was not added to the demo book page of sketch
and I'm adding it here

Jira: BRIX-28
310: back out change that broke the LocalAnswerMan

Jira: BRIX-310
310: localanswerman's support for programmingexercise & new answerKey codeExamples

- allow the programmingexercise canned response info to be added to the localanswerman dynamically for a particular exerciseId.
- update the code question template to add the previously built in canned info.
- add the codeExamples property to the template's answerKey and return it in the correctAnswer property from the localanswerman when all attempts are used.

- display the 1st returned codeExample from the correctAnswer which replaced the correctCode property

Jira: BRIX-310
Bump version number from 2.0.0-rc.1 to 2.0.0-rc.2
- Using icons in the feedback headers
- fix for line number positioning when single column
Add feedback flipper arrows after 2nd attempt
- drawFeedbackFlipper_ method draws from redrawFeedback
- css styles on i in the feedbackFlipper class, including hover
Start on feedback flipper logic, but onClick handler doesn't fire
310: codequestion feedback flippers (small changes)

- fixed warnings
- attached handlers to the correct elements
- used span element for flipper icons instead of i element

I think the feedback flippers are being rendered in the wrong place, but I'm not trying to implment the feature in this commit just make a few improvements to what it does now.

Jira: BRIX-310