Merge pull request #1170 from taiwen/develop

Merge for sitemap module
Merge pull request #1171 from taiwen/develop

Upgrade Zend Framework to 2.4.0-dev
Update README-GIT.md
Merge pull request #1172 from taiwen/develop

Upgraded `Imagine` to 0.6.1 per Issue #1166
Fixes #1166 by adding `$options` parameter