Updated trees and better depth of field effect.

Leaves were made to be translucent and double sided and the leaf texture was edited to give trees a more natural look.
I made the DOF effect work much better but work still needs to be done to clean up the old code and perfect the new effect.
I'm not sure if the comments in my code would be considered excessive but that is just how I like it to reduce the stress of having to figure out things again if I don't get the time to work on this project regularly.
Almost, it works like that but is usually (and IDEs do this automatically):

```java
/**
 * Comment
*/
```
With a little space + asterisk prefix on each content line 

Oh, and I just meant the "//set the ..." line, didn't realize that was part of the TODO starting on the previous line. Yeah, max line length is 175, good catch, and goes well with the long format comment - could always use a non-javadoc setup like so:

```java
/*
 * TODO: Stuff
 * More stuff
*/
```

But that's nitpicking, really :D