Beginning liferay development

Hi Rich,

I took a pass through the first learning path. I incorporated Travis' formatting fix https://github.com/liferay/liferay-docs/pull/69. Indenting 4 more spaces than each list item's text, however, is the only way to format the code properly and preserve the numbering of the list items.

I added header IDs so that we can more easily use them in references from other tutorials.

I also numbered the figures using whole numbers.

Thanks,
Jim