Version 2.7.6-beta.1

• Update to latest ember versions, 2.18 (3.0 coming tomorrow however, will update again then)
• Supported ember / ember-cli version changed to 2.15+
• Docs moved to bootstrap 4
• All traces of bower have been removed (except for ember test scenarios, but that will change with 3.0 tomorrow)
• NPM assets are now imported via ember-cli 2.15, instead of doing it with broccoli plugins
• Ability to import Froala's third_party plugins #50