Add timeout/interval methods to WebhookClient (fixes #1181), and clean up docs (#1204)
Add timeout/interval methods to WebhookClient (fixes #1181), and clean up docs (#1204)

* fix up 1181

* Clean up documentation

* Update WebhookClient.js

robflop/discord.js,aemino/discord.js,Lewdcario/discord.js,Drahcirius/discord.js,hydrabolt/discord.js,Lewdcario/discord.js,devsnek/discord.js,appellation/discord.js,SpaceEEC/discord.js,hydrabolt/discord.js,hydrabolt/discord.js,appellation/discord.js,CodeMan99/discord.js,aemino/discord.js,SpaceEEC/discord.js,robflop/discord.js,zajrik/discord.js,Drahcirius/discord.js,zajrik/discord.js,appellation/discord.js,Lewdcario/discord.js,devsnek/discord.js,SpaceEEC/discord.js,aemino/discord.js,zajrik/discord.js,Drahcirius/discord.js,robflop/discord.js,CodeMan99/discord.js,CodeMan99/discord.js,devsnek/discord.js