Import wiki content about Smarty templating
Created by: seancolsen
This PR imports the following wiki pages:
- https://wiki.civicrm.org/confluence/display/CRMDOC/Page+Templates
- https://wiki.civicrm.org/confluence/display/CRMDOC/Customize+Built-in+Profile+Contribution+and+Event+Registration+Screens
- https://wiki.civicrm.org/confluence/display/CRMDOC/Extending+Smarty
I would like someone else to review this before merging. Maybe you even want make some improvements to this PR yourself? That would be great because I'm likely to agree with anything you suggest. Also I'm fine with merging as-is.
Notes:
- I think the level of quality for this content is a bit sub-par, but I don't feel confident enough in the subject matter to improve it myself.
- For the most part, I kept my edits to formatting-only.
- I put them all in one place, but I'm not sure this is the best way to organize this content.