Add prettify to JSDocs

Add "prettyprint" class name to each code block because it is needed for prettify to process the block.
Smaller code font-size
Merge pull request #1 from simurai/jsdocs-syntax-highlight

Smaller code font-size
Remove prettify scripts
Fixes API code blocks

being collapsed.
Merge pull request #2 from simurai/jsdocs-syntax-highlight

Fixes API code blocks
Merge pull request #56 from aadsm/jsdocs-syntax-highlight

Add prettify to JSDocs