added neighborhoods association to area model
refactored meeting length specs
added specs for meeting type
added area references for neighborhoods and meetings migrations
added commented titles for area spec categories
removed area references from meeting factory and migration, because it already has a neighborhood reference
added real-world meeting type names to meeting_type factory
added area_id to neighborhoods create_table method in db/schema.rb file
random . files
removed meeting_type model, migration, spec, factory, etc.; will use string attribute on meeting model instead
added specs for meetings_days join table
replaced days and meetings_days models with a serialized array of day strings in meeting model; also added tests for this feature