Add option to get a user/channel from name or ID

[SpinahVieh]

Right now you always have to wait for a channel or user to be active in some way, which results in problems. For example when you want the bot to type regularly in a specific channel you always need to grab it from someone typing in it first. So you cant make the bot post a text every five minutes in the channel unless somebody types in that channel before. Equal for users, but the problem is rather minor there.

[Rapptz]

There's Client.get_channel which you pass in a string ID and you get the channel.

For users you can use discord.utils.find.

e.g. discord.utils.find(lambda m: m.name == 'Hello', some_server.members).