Minor README enhancements
[awesome] Save one character in the battery-status by omitting the first 0
[aliases] Made .aliases fish-compatible
[shell] Corrected umask to rw(x)------

What was I thinking when I wrote *that*?
[fish] Ported .shellrc to fish

For now, that introduces code duplication, urgh!
[fish] Basic prompt and no greeting
Two more pieces of fish-interoperability
[fish] Add /usr/sbin to PATH