Added following commands:
.rch channel_name (removes a channel)
.rvch channel_name (removes a voice channel)
.rr @User role_name (removes a role from a user)
.sr @User role_name (adds a role to a user)
Added more aliases to administration functions, improved some stuff.
Just in case someone needs assistance, so that they can find me when i
relaunch nadeko, since i will be firing up NadekoBot again and on a much
better server tomorrow or day after tomorrow.
.r role-name [role-color(optional)] (creates a new role)
.b @User (bans a user)
.k @Users (kicks a user)
.vch channel_name (creates a new voice channel)
.ch channel_name (creates a new text channel)
