Adding elements of the plugin
Add button and initialize layers folder
initialize map mbtiles, add css
edina/fieldtrip-cobweb#2: changed the downloadItem to use fileTransfer to be used for both tiles and editors
edina/fieldtrip-cobweb#2: add functionality for merging remote layers and local layers into listview
edina/fieldtrip-cobweb#2: add functionality for adding the layer on the map from the listview
edina/fieldtrip-cobweb#2: enabling the db for reading tiles
edina/fieldtrip-cobweb#2: there is still problem with opening db, need to commit before I start changing the SQLITE plugin
edina/fieldtrip-open#62: changed utils to file for file transactions
edina/fieldtrip-cobweb#2: if the downloaded item is mbtiles file rename the extension to db
edina/fieldtrip-cobweb#2: zoom to bbox that is calculated from the tile numbers of the db