(u)mount-chroot: Increase portability

Not all systems (i.e. Ubuntu) have bash located at /usr/bin/bash, so use
/usr/bin/env to find bash.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>
wgetrc: added wgetrc

Added .wgetrc to dotfiles repository

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>
i2c-conv: Add i2c-conv script

Add "silly" script to convert between so called 8-bit I2C addresses to real
(7-bit) I2C addresses.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>