Should fix filth cleaning hangups which may sometimes happen, notably when used with mods such as Achtung

Overhaul
- The code has been rewritten end to end. Everything modernized and done using best techniques I've picked up since first writing this mod. Faster, leaner, and may potentially fix that odd bug report of uncleanable filth.

1.4 support (no changes needed)

Update
- New feature, Dirty mining: when enabled, the stone chunks that are spawned when mining stone will also have rocky debris underneath it.

- If a stone chunk is placed in a storage building, it will not render its offsets.
- Minor optimizations

Update
- Added new mod option which allows you to disable rocky filth from despawning due to time, meaning it can only be removed if cleaned.
- Fixed a bug in which filth can be misplaced if it's along the outermost tile of the map.
- Misc code improvements to improve load speed and error resistance.

New
- Added mod option to disallow rock filth from spawning on water (when the mod does it's first-time setup), in the event rock chunks are out in the water.
- Standardized the language keys

- Minor load-game performance tweak

- Minor update fixing up some old code
- Text in the settings are now exposed to XML translation keys, if anyone wants to make a translation.

- Typo fix in previous update.