Fixing up examples:

/src/rita.js:
- Re-enabled RiText.defaultAlignment
- Added RiText.prototype.color() as used in www/examples/canvas/simplest.html
- Added RiText.showBoundingBox()

/www/examples fixes:
- simplest.html (was making unsupported RiText().color()... call)
- grammar-haiku (both canvas and processing versions needed fixing)
- alignments (canvas ver. making Processing calls, invalid call to
  showBoundingBoxes)
- typewriter (processing needed wav path adjusted, canvas had a few bad
  function calls)
- move_to (canvas had e.getType() instead of e.type()
- fade-to-text.html (same as move-to above)
- words-letters-lines (canvas had bad call to showBoundingBoxes)
Merged in fix-ups to examples from fixsamples branch. TODO: Caching for _getMetrics to fix create-lines and words-letters-lines (caught in non-cache loop for _getMetrics)