and more tidying up and grammar etc

also bring in about half the options

curtesy of
https://www.iconfinder.com/icons/

Original here:
https://wiki.civicrm.org/confluence/display/CRMDOC/Create+a+Module+Extension

still missing some macro content! :-/

update from civi

API: code examples broken or with non-standard style

small edits to Erich's recent PR

CRMDOC/Create+an+Extension

This completes transfer of

https://wiki.civicrm.org/confluence/display/CRMDOC/Create+an+Extension

This page is yet to do:

https://wiki.civicrm.org/confluence/display/CRMDOC/Create+a+Module+Extension

update from core

use hash syntax for headings, migrate "developer community" wiki page

https://wiki.civicrm.org/confluence/display/CRMDOC/The+developer+community

perl -0777 -i -pe 's|^(.*)\n-{3,}$|## $1|gm' `find . -name '*.md'`
perl -0777 -i -pe 's|^(.*)\n={3,}$|# $1|gm' `find . -name '*.md'`

New content in markdown.md page and lots of cleaning-up of other content

INFRA-230 - Add rewrite map to facilitate wiki migration

Large scale clean up of markdown code (in almost all files) to conform to markdown conventions that I observed to be used consistently in the official CiviCRM User Guide. These convensions are now documented in the markdownrules.md file

Documentation about the documentation 

tweaks

Misc > Markdown: removing TOC from page content b/c it's already available in nav menu, and including it in page content does not seem consistent with any content in user guide

gender-inclusive pronoun for extension devs