Fix missing shortcode in doc

Use new syntax for example.
Correct alias
showcase: update ucsb entry
Fixed typo in summaries description in the documentation
Github page strategy for username.github.io repos

The whole article should maybe be rewriten to have a better content flow (maybe adding a table of content), to introduce both possible strategies. But at least, the technical steps are there!
Add Ace template engine support
Merge commit 'a0d956c2ad7371d989fc192e122f0097b07a5b01'

* commit 'a0d956c2ad7371d989fc192e122f0097b07a5b01':
  Add Ace template engine support
  Github page strategy for username.github.io repos
  Fixed typo in summaries description in the documentation
  showcase: update ucsb entry
  Correct alias
  Fix missing shortcode in doc