editing some method name & fixing typings

Removed socialLinkTypes, replaced by GetSocialLink
Added comment for Routes/Miscellaneous constructor.
Added comment for Routes/Miscellaneous#getSocialLink
Added ForumThread#createForumComment method.
Added Guild#getChannel method.
Fixed Member#getSocialLink returns (from GetSocialLink | void to GetSocialLink)
Removed Member#addToGroup, replaced by Member#addGroup
Removed Member#removeFromGroup, replaced by Member#removeGroup
Edited CreateChannelOptions and EditChannelOptions, property topic has been renamed to description

DinographicPixels / TouchGuild