Optimize svg cinnamon settings

A further 518 KiB.
@clefebvre A further 216 KiB can be saved by removing the metallic effect from cat-prefs.svg Should I do so?

Below is a 200 px png for comparison.

Original with metallic effect
![cat-prefs2](https://f.cloud.github.com/assets/2271906/240799/a95a14e4-894a-11e2-8349-0f78779588b3.png)

Without metallic effect
![cat-prefs](https://f.cloud.github.com/assets/2271906/240800/b72f71b8-894a-11e2-829a-1e9c68892843.png)


Also, can I convert text to actual text?(its as a path now).