Issue #278425 by andypost, droplet, OnkelTem, chx, c960657, drewish, kotnik, realityloop: Change notice for: Using basename() is not locale safe.

- Patch #1307332 by pillarsdotnet: improve the docs for DrupalLocalStreamWrapper::getLocalPath() function.

- Patch #1224802 by kiamlaluno: DrupalLocalStreamWrapper::stream_open() uses a local variable instead of the argument passed by reference.

- Patch #443286 by c960657, Damien Tournoud, drifter, webkenny, scor: international characters break file handling.

#551658 follow-up by pwolanin: Revert back to D6-style temporary folder logic to avoid various platform issues.

- Patch #701358 by aaron, quicksketch, chx, pwolanin, aspilicious: the file API presumes a hiearchical file storage.

#331951 by aspilicious, sun, jhodgdon, Morbus, et al: Figure out and apply coding standard for casting.

#551658 by pwolanin, aaron, drewish: Move private files to an opt-in system, and no longer force private files to live within web-accessible directory.

#653940 follow-up by Damien Tournoud: Clean-up of error handling from first stab at test reporting fixes.

- Patch #331171 by pwolanin, mfb, drewish: allow modules to alter the MIME extension mapping rather than setting a huge variable.

#497118 by chx, catch, pwolanin, JoshuaRogers, and Jacob Singh: Remove the function registry. While the hope was that this would result in improved performance for low-end hosts, it comes at the expense of critical development experience problems and less benefit than something like APC. Class registry remains intact to facilitate autoloading.

Of all the patches to accidentally commit without a message. :( Rolling back registry rip. Let's try that again.

#517814 by jmstacey, justinrandell, pwolanin, drewish, Jody Lynn, aaron, dopry, and c960657: Converted File API to stream wrappers, for enhanced private/public file handling, and the ability to reference other storage mechanisms such as s3:// and flicker://.

- Patch #227232 by dopry, c960657, jmstacey, pwolanin, aaron, drewish: added initial support for PHP file wrappers.