2.1.0 Use boost in edismax search

What's Changed

• remove need for blocks to have the 'block' class by @joshdentremont in #42
• Fixed for digitalutsc#4 by @kylehuynh205 in #44
• Update README.md by @rosiel in #46
• Add Searchable Entity Formatter. by @rosiel in #45
• Remove deprecated ${var} pattern. by @rosiel in #47
• Adding boost number for each fields for edismax query by @kylehuynh205 in #49

Full Changelog: 2.0.1...2.1.0