.bash_zen: don't reset env on reload

Otherwise I keep resetting the rootfs I'm using!
.gdbinit: expand history size
.bash_zen: change invocation of commands

- don't use tee on final command (break interactive shells)
- move perf profiling to before the chroot
.bash_zen: fixup rootfs handling

It's easier to have a variable I know exists. Also add a helper function
fro setting up all those bind mounts.
.tmux.conf: add M for Move Window
.bash_zen: final fixes

I've now moved to using env variables for the logging. However you do
need to ensure that sudo allows env variables to be passed though.
dotbash_zen: cleanup
Merge remote-tracking branch 'github/master'