Update changelog

CHANGELOG

3.1.2 (5 November 2013)

*	Abandon .chm help format; Package API documentation in plain HTML;

	(Launch lib/api/index.html in your browser)

*	Deprecate BAIL in favor of HALT (default: TRUE)

*	Revert to 3.1.0 autoload behavior; Add support for lowercase folder

	names

*	Allow Spring-style HTTP method overrides

*	Add support for SQL Server-based sessions

*	Capture full X-Forwarded-For header

*	Add protection against malicious scripts; Extra check if file was really

	uploaded

*	Pass-thru page limit in return value of Cursor->paginate()

*	Optimize code: Implement single-pass escaping

*	Short circuit Jig->find() if source file is empty

*	Bug fix: PHP globals passed by reference in hive() result (Issue #424)

*	Bug fix: ZIP mime type incorrect behavior

*	Bug fix: Jig->erase() filter malfunction

*	Bug fix: Mongo->select() group

*	Bug fix: Unknown bcrypt constant

3.1.1 (13 October 2013)

*	NEW: Support OpenID attribute exchange

*	NEW: BAIL variable enables/disables continuance of execution on non-fatal