and reminding everyone to always use buildkit

Update phpunit.md to reflect discussions on chat.civicrm.org

Remove restating of how to access api

This was once about standards, but no longer is

The lines I took out are not all inclusive (ie. drush & wp-cli are excluded) - try to repoint to right place rather than re-state

Remove references to whether apis are supported

These references were about a division of responsibility between the core team and the api team. There is no valid distinction there anymore

Remove reference on how to hack with how to fix

We have a template for how to fix core files to support this hook properly. This commit points people to it.

Minor improvements to javascript doc

extensions/structure - Document the big E

Javascript Coding Standards

Add in some more bactics

API architecture page

ref:
https://github.com/civicrm/civicrm-dev-docs/pull/228#discussion_r130018478

ref:
https://github.com/civicrm/civicrm-dev-docs/pull/228#discussion_r130018015

ref:
https://github.com/civicrm/civicrm-dev-docs/pull/228#discussion_r130017573

from:
https://wiki.civicrm.org/confluence/display/CRMDOC/How+to+migrate+or+write+an+api

Direct import with no edits

from:
https://wiki.civicrm.org/confluence/display/CRMDOC/API+Architecture+Standards

Direct import (no modifications).

Highlight civicrm.settings.d

ref:
https://github.com/civicrm/civicrm-dev-docs/pull/217#issuecomment-314945998

ref:
https://github.com/civicrm/civicrm-dev-docs/pull/217#discussion_r127111272

CRM-20037: document added feature for searchColumns hook

Add security note about AngularJS in Smarty

CRM-20926 - hook_civicrm_{alter,xml}Menu - Fill in docs. Add PHPIDS docs.