Rename dot files as separate from config files
Add battery script to bin folder

Credit goes to: @richo (https://github.com/richo/battery)
Add a (very messy) tmux.conf

I just started using this tool, so my conf file is incredibly messy.
I'll try and fix it in the future, but for now it's a hodgepodge. It's
more important that I get it up there than I make it perfect.