Implement Logic for ReportReason and add some bound methods

[mtalaeii]

• Add report bound method to message class
• Add download bound method to media class
• Add saveContact,removeContact,inviteToChannel,read bound methods to Message class
• Add ban,unban,kick,revokeAll bound method to GroupMessage class
• Add view bound method to ChannelMessage class
• Do some fixes to DiscordReason and change it strategy

[danog]

btw about the calls wrapUpdate, I think they can just be removed

[danog]

Thank you!