Tweaked capacity factors, credits, emissions limit

A minor update:

• Buffed solar production slightly, so as to achieve an annual average capacity factor of 0.175 (typical for this class of tech is 0.10 - 0.25, according to this).
• Buffed tidal production slightly, so as to achieve a fixed capacity factor of 0.275 (typical for this class of tech is 0.20 - 0.35, according to this). The ebb and flood of the tides is not a random process!
• Nerfed wave production, so as to achieve an annual average capacity factor of 0.315 (typical for this class of tech is 0.25 - 0.32, according to this).
• Nerfed wind production, so as to achieve an annual average capacity factor of 0.350 (which is typical for this class of tech, according to this).
• Increased starting credits to 1000 K, credits per MWh served to 1.15K (end-of-turn sum gets rounded), and emissions limit to 3,200 tonnes; balances the difficulty increase from nerfing wind and wave.
• Added game version info to title screen.

Cheers =)