doc update
add BBCode reference
update 'Creating posts', change screenshot (use duepuntozero theme)
update 'Install', add point on create view/smarty3 folder
update 'Plugins', add section on templates
Wrap class OAuthException with !class_exists

Same problem and solution as discussed on
https://drupal.org/node/1334528
Merge pull request #671 from cpfeiffer/OAuthException

Wrap class OAuthException with !class_exists
bug #540 and hush up a couple of log messages that are way too verbose
Merge https://github.com/friendica/friendica into pull
ZH-CN: update to the strings
system support for complete blocking
Merge https://github.com/friendica/friendica into pull
Merge pull request #670 from fabrixxm/help

doc update