Optimus v2.7.6 for SMF 2.0.x

Full Changelog: v2.7.5...v2.7.6

Optimus v0.5 for ElkArte

• Removed generation of common OpenGraph metatags
• Updated some deprecated code
• Updated languages

Optimus v0.3 for PortaMx Forum

• Fixed found issues
• Added support for .gz files
• Removed unused language strings
• Added compatibility with PortaMx Sitemap

Optimus v0.1 for Wedge

Tested on Wedge 1.0-beta

Added some new options, special for this version.