Implement Guild Package

[unpluggedsam]

⚫ HypixelGuild

• Add basic methods to retrieve information about the guild.
• Add methods to retrieve a List of all the HypixelGuildMember's in the guild.
• Add methods to retrieve information about daily and weekly GXP.
• Instantiate by a guild name or a player UUID.

⚫ HypixelGuildMember

• Represents a HypixelPlayer's guild stats.
• Keeps track of daily & weekly GXP.
• Add method to convert to a HypixelPlayer.
• Add method to HypixelPlayer to convert to a HypixelGuildMember.
• Add method to get the HypixelGuildRank.

⚫ HypixelGuildRank

• Keeps track of all the guild ranks in a guild.
• Keeps track of the information about the rank.

⚫ HTTP

• Fixed bug requesting Player endpoint instead of Guild endpoint.
• Refactored misleading variable names.

Notes:

This will finish most of the guild package. There are still a few kinks and methods that I would like to add in the future.

Closes issue #43