All Scraped Data is stored in Internal Memory (previously only current day's Data was stored)
Merge pull request #23 from Kjven/kevin

Fixed graph labeling.
TideDataSet now stores sid instead of the station title
App uses cached data if no internet connection is available.
If no Cached Data is found, App no longer crashes. App Toasts messages when using cache
Merge pull request #24 from Kjven/Scraper

Fully Integrated Data Caching.