Use config interfaces where possible.

Change-Id: Iaabedda2fa68c4e5562bb069dcdf15fa0c3beeea
Depends-On: I5f140e89bfb8c57804d0a500bbc9f5c18555b0e9
Reviewed-on: http://gerrit.dmdirc.com/2768
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>
More code style fiddling.

Show the editor gutter at 100 cols not 80, as we don't really do
80 in many places.

Move static methods after normal methods, because I changed my
mind.

Change-Id: I2f69de3065f33476fb735ac7441a2184a63229bb
Reviewed-on: http://gerrit.dmdirc.com/2769
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager