Add .gitignore and a few READMEs
The shell script baudcheck needs bash

BTW It is pretty weird to call the shell script a "C program" and
use the .c extension.
Add possibility to point at ARDUINOROOT when not using ENV=arduino
Add a README.baudrate to show the effect of alternative baudrates
Delete .hex and .lst from the repository
Add a comment about a RAMSTART conflict in iom8.h
Modify the Makefile so that the resulting filename have the baudrate in it

Also add a README.sodaq with some details of how to rebuild the bootloader
for the SOdaq Moja board.
A bit of textual improvement of README.make-bug
Merge branch 'master' of https://github.com/inxonic/optiboot into atmega8515