• StreamableInterface was renamed to StreamInterface; typehints were updated accordingly.
• ServerRequestInterface::*FileParams() were renamed to *UploadedFiles(). They now expect and return array trees of a new interface, UploadedFileInterface.
• UploadedFileInterface was added to provide compatibility between SAPI and non-SAPI environments with regards to handling upload files.
• A number of clarifications were made on UriInterface with regards to URI component delimiters.