Smaller patch to get some fixes and GUI changes in before the next big progression patch.

• Added Rocket Salvo prestige upgrade for turrets.
• The dwarves can no longer stack above the top of the screen! Instead, once the tower is too large, they start dynamically compressing and getting closer to each other, physically and emotionally. Turrets now also stack differently after the 8th. (Note: This will likely function weirdly until you prestige, if you already have more than 8 turrets in your existing save.)
• Added some new stats to the Stats Panel. Are there any other important or fun ones you'd like to see? (Note that some of these stats won't display properly until new run)
• More GUI and description polish. Eg; All flavour text in upgrade/artifact descriptions is now of different color, and so are all the numbers, for better readability. All text has also been transferred to external files for easier localization! Also added few missing elements and dwarf/artifact stats. Etc.
• Bug fixes, tweaks and optimizations.