UNVERIF. Fixes for sheets

- Health is a ceiled float
- Experience is a float * 1000 casted to int (??? was was it before)
- ServerData is read through an private accessor
UNSTABLE Added disastrous fixes to cope with the Resource system.

- Sounds are not preloaded from matmos_ folders anymore, but after the expansion knowledge is built
- Knowledges are relative to the sound/ folder now
- A CacheRegistry tries to prevent sounds from being added multiple times
- SoundManagerChild get weak paths relative to sound/ to be replaced with the actual path on playback
- A SoundStream can be invalid if starting it has resulted in a failure to fetch the actual path
- Files are no longer checked missing or not (removed because of the Resource system)