tourism=attraction - partially restore old label, stop rendering areas

it reverts some changes introduced in #941 - styling of tourism=attraction labels is changed to the old one, except depending on way_pixels and yielding to building label style

Closes #1047
Closes #460

Rendering of tourism=attraction areas is not really useful, as it may be exactly anything and anyway this pink area rarely gets displayed. The new tourism=attraction label introduced by #941 does not look very nice in many situations.

http://www.openstreetmap.org/node/274088761#map=19/50.06627/19.94299
![selection_005](https://cloud.githubusercontent.com/assets/899988/4626060/68265a92-537d-11e4-9a14-ae5d8c4ef81b.png)


http://www.openstreetmap.org/#map=17/51.50264/-0.17279
![selection_002](https://cloud.githubusercontent.com/assets/899988/4626014/eef8aa3a-537c-11e4-8077-17fa495d11d8.png)

http://www.openstreetmap.org/#map=19/51.51183/-0.15888
![selection_003](https://cloud.githubusercontent.com/assets/899988/4626018/fc1901ec-537c-11e4-9e38-b8f20ac486c6.png)

http://www.openstreetmap.org/#map=18/51.54213/-0.14535
![selection_004](https://cloud.githubusercontent.com/assets/899988/4626024/03244eb0-537d-11e4-8943-c16a453c2938.png)