Make DiscordGuild.Emojis and DiscordGuild.Roles into ConcurrentDictio…

…nary instances

Merge remote-tracking branch 'origin/master'

fix redirect

Merge branch 'patch-112'

Conflicts:
	DSharpPlus/DiscordClient.cs
	DSharpPlus/Entities/DiscordPresence.cs

hopefully fix occasional build failure

oops, i messed up

attempt to capture docs build

Merge remote-tracking branch 'upstream/master'

bring back the old readme

fix build ps1 for new suffix changes