Move processors into their own package.

Make all package-private fields and methods they hackily touched
into public, for now.

Change-Id: Ica056a901535b0c0f503283d27ff5210fe625d26
Reviewed-on: http://gerrit.dmdirc.com/3952
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>