ElasticSearch query improvements

[guyschwartzberg-student]

Common issues:

• Multiple word searches only match one word (For instance, fried chicken gives results that contain only fried or only chicken)
• Attempt to make results more diverse in terms of website source
• Match dish types to ingredients to improve search (Map vegan to exclude chicken and other types of meat, Map cuisine type (chinese, mexican) to certain dishes that are of that cuisine, match eggfree to exclude egg as ingredient, etc)