Adds a cache for the homes, preventing constant SQL queries every time someone tabcompletes, runs a command etc

(that's likely all that really matters for end-users, the rest is just code stuff)

• Adds a cache for the homes, preventing constant SQL queries every time someone tabcompletes, runs a command etc
• Simplifies the safety checks and changes to a bitmask
• Refreshes the cache on sethome, delete home, and the first time someone runs a home command
• Removes the cache when someone logs off
• Simplifies command logic and condenses duplicate code
• Preparation for expansion to allow more flags
• -o -override flags should be able to be used in any order in the command now
• setting a home when you have no homes set and you do not provide a home name will now set a home with a default name instead of erroring out