[#4648 state:resolved]

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Small optimization of 1.9 unescape. We should make sure that inbound ASCII always means UTF-8. It seems so based on a quick survey of common browsers, but let's be sure

Stop the flash middleware from forcibly loading sessions even if the user doesn't use sessions at all

Improve performance of the log subscriber by remembering the list of all loggers instead of trying to extract them each time

Eliminate the need to check for superclass changes to the callback stack each time through the callbacks

* Took out stuff that's not relevant (or useful) anymore.
* Some formatting.
* Added helpful links to get started with Rails.
* Took out Apache htaccess tutorial since we aren't teaching Apache here.

Signed-off-by: NRizwan Reza <rizwanreza@gmail.com>

removes Array#random_element and backports Array#sample from Ruby 1.9, thanks to Marc-Andre Lafortune