Updated Request func to handle POST as well.  Updated other functions to use it.  Now all HTTP API calls run though the Request function to make the actual call.
Updated Request func to handle POST as well.  Updated other
functions to use it.  Now all HTTP API calls run though the
Request function to make the actual call.

robbix1206/discordgo,VagantemNumen/discordgo,jonas747/discordgo,bwmarrin/discordgo,iopred/discordgo