Conkyrc changes

- Use mpc rather than spotify for currently playing song
- Change ram % to red when >= 75%
- Use br0 rather than eth0
Fix the paths to quickswitch.py
Control mpd with the Print Screen, Scroll Lock and Pause keys

Extremely useful for keyboards that don't have media keys.
konsole: Don't save geometry

We have a tiling window manager, this is pointless