Template engines

[tomjanssens]

Write documentation and example for using the different template engines.

For now, I'll refer to http://developer.joomlatools.com/framework/template-system.html and think that what w should probably do is:

• write a similar top level (call it a refactoring of this document) and then sub-section this work about the template engine.

Ideas to cover in the Engine section:

• motivation for the engine (maybe in the introduction)
• what does it do? its main requirements as an arch. "It defines a set of rules for the processing of a template's logic."
• The Factory's function
  • what each template engine gets out of the box (KTemplateEngineAbstract)
• compiling the template
  • parsing out all the template functions
  • loading all the filters that are responsible for the tags, and asset, document, module filters, etc.
• defining/adding template functions, _initialize (custom example maybe)
• list each engine and link to the class in github, describe the highlights of each.