Extension:Update/Release notes

Changes for Extension:Update.

0.1.1 (2011-10-09)
features: bugfix:
 * new Special:Update interface (no longer based on Special:Version)
 * various strict php warnings/errors (thanks Wikimanz)
 * now tries to guess MW link to extension if url is diff
 * improved version comparison using php's version_compare
 * added mediawiki 1.15.5 support (better http request handling)
 * improved translation support for translatewiki.net (thanks Nikerabbit)
 * hook SoftwareInfo removed

testing:
 * trunk 2011-09-22 stable 1.17.0, 1.16.0, 1.15.5

0.1 (2011-09-20)
Initial release includes checks for:
 * MediaWiki stable version (w/ download link)
 * MW stable PHP requirement
 * MW stable MySQL requirement
 * MW extension page version changes from extension credits