Updated hotel views, controller, model

Added new fields to the hotel model, controller, and views:
chain, numberOfRooms, individualRate, groupRate

Created hotelchains.json to store a list of all hotel chains

Updated file paths for hotel images, and the href's that are referencing these files

Created meetingrooms.json for Westin SF Market Street, to populate Meeting Rooms content on hotel detail page

Updated hotel detail page with Meeting Rooms and Map

Created "algorithm" to calculate group rate (multiples individual rate by 0.92). This value gets saved whenever a new hotel is created or an existing hotel is updated.

Removed module links from the top menu navbar.

Fixed the previous issue when editing a hotel and the city select field did not initialize with its saved value.