change jungleleaves and -wood textures

![screenshot_4119663112](https://f.cloud.github.com/assets/3192173/1413898/6dd8a7b2-3e5a-11e3-886c-e4d5f4c63088.png)
![screenshot_4119723009](https://f.cloud.github.com/assets/3192173/1413899/72ab452e-3e5a-11e3-9824-e4613b956f1f.png)