% of Total Income and Santa position fix

Two things with two commits
Display percentage of total income for building and upgrades:
![2014-01-11 12 31 40](https://f.cloud.github.com/assets/4813234/1893596/85fad1a0-7aa3-11e3-9959-a3d9c5a85fcb.png)
Fix Santa position on the screen (may be wrong, i don't know js):
![2014-01-11 12 31 50](https://f.cloud.github.com/assets/4813234/1893600/bde7ce2e-7aa3-11e3-8e63-3e2dd30830e6.png)