v0.11 Initial set of GDT UI features

Summary

This release includes several requested features for the GeoData application. Some of this apply to all TIMDEX UI apps, while others are toggled by a feature flag.

What's Changed

• Add GDT feature flag by @jazairi in #111
• Update 'no results' partial by @jazairi in #110
• Redesign filter sidebar by @jazairi in #112
• Update theme gem and document PLATFORM_NAME variable by @jazairi in #114
• Redesign local nav for GDT by @jazairi in #113
• Add 'Ask GIS' panel and reorganize SCSS by @jazairi in #115
• Add search summary panel and full filter support by @jazairi in #117
• Add site title partial by @jazairi in #118

Full Changelog: v0.10...v0.11