Steve's Realistic Sleep

Added

• Daytime sleeping (by Superkat32 in #48)
• Exponential sleep speed curve
• Cloud speed multiplier
• Optimised crop growth speed multiplier implementation
• Thunder speed multiplier
• Ice and snow formation speed multiplier
• Precipitation (cauldron filling) speed multiplier
• API for use by other mods
• Separate config options for random block/fluid tick speed multipliers (disabled by default due to high TPS usage)

Changed

• Reduced the length of the config screen tooltips (by Superkat32 in #48)
• Config menu title to Realistic Sleep Config (by Superkat32 in #48)
• HUD messages use translation entries instead of hardcoded text (split up in parts)