Merge pull request #2 from Kjven/kevin

Added updating of grahview on load from web. It displays real tide heigh...
Merge pull request #3 from Kjven/kevin

Adding readme comments.
Moved the Scraper into it's own class. Created an Application Class to store global information across multiple Activities. Created superActivity abstract class.
Moved the Scraper into it's own class. Created an Application Class to store global information across multiple Activities. Created superActivity abstract class.
Added Graph View to TideApplication. Created methods in Scraper to update Graph Views.
Updated the conversion of array list to GraphViewData array, this change fixes some important bugs
Removed hours scraping (was redundant as there will always be 0 to 23 hours). Added comments above methods in Scraper class
Fixed buggy graph display. Displays only the current day on the graph. Removed obsolete objects.
Fixed issue where today's data was not being retrieved properly
Removed unused object and method from MainActivity
Added comments to document classes
Moved HTML extraction into extractHeight method (in Scraper class)
Created Null test case
Added test, forgot to add in earlier commit
Merge pull request #5 from Kjven/gavin

Gavin - Implemented Scraper Class, Interfaced with Graph, Implemented TideApplication, superActivity