Big bug fix and final version of game (until further notice)

There are several bug fixes and one or two new features that I have added in this final version:

-The bug in which you could open a window for a sign has been fixed and sign dialog windows have been fixed

-UI has been simplified dramatically to account for being a web game primary

-A final scene has been added

-Signs with fun facts about elephants have been added to the game (only one sign per level.)

This is going to be the final version of Elephant Adventure. It has been a fun and worthwhile task to make a game from scratch as I am not a game dev by trade.