adding basic search function, where posts are ordered by how many matches the query makes with the title, description, hashtags, and category
adding search functionality: ranks posts based on number of matches made with query, importance of hits from most to least title->hashtags->description->category, relevance to current user (do hashtags in post relate to hashtags of user?), takes into account date posted, and is also case insensitive
adding search functionality: ranks posts based on number of matches made with query, importance of hits from most to least title->hashtags->description->category, relevance to current user (do hashtags in post relate to hashtags of user?), takes into account date posted, and is also case insensitive