Add handling for components, attachments, embeds, and emoji (only preliminary).

[clin1234]

Status?

[guerinoni]

I can't merge it...

• 0bf8eeb merge instead of rebase
• Omit version number, add features for channel and message objects duplicated commit
• Add preliminary support for attachments and roles duplicated commit
• Add preliminary support for attachments and roles duplicated commit
• Replace .value call with subscript operator for settings duplicated commit
• Remove Git diff crud left by a previous commit duplicated commit
• Fix formatting issue introduced by Qt Creator duplicated commit
• Run clang-format duplicated commit
• Fix up bungles of previous commits duplicated commit
• Add preliminary support for attachments and roles duplicated commit
• Add preliminary support for attachments and roles duplicated commit
• Fix build errors, and rename role files to proper case duplicated commit
• Clean code duplicated commit
• Add latest version of API duplicated commit

[clin1234]

Should be fixed...