Add configure script and Makefile template

This allows us to compile the Brewslave without the Arduino IDE and switch
certain features on and off at build time.
Fix compile time errors

Apparently, Ubuntu 12.04's avr-gcc is a bit more picky than the one provided
with the Arduino IDE.
Conditionally compile the Nokia LCD
Add support for the cheapo NTC temperature sensor
Return current instead of set temperature
made Arduinomk directory configureable
made Arduinomk directory configureable
merged
removed debug output
Merge pull request #1 from matze/duemilanove-compat

Duemilanove compatibility
made Arduinomk directory configureable
Merge branch 'makefile-support' of github.com:phbender/brewslave into makefile-support
Arduino.mk location cofigureable
Merge branch 'makefile-support' of github.com:phbender/brewslave into makefile-support
Minor OS X correction
Update .gitignore

On OS X make generates additional build files.
Update .gitignore
Revert "Minor OS X correction"

This reverts commit 8d1a9a723736cdb180a3fe7ecb17ee24d82a77ad.
Merge branch 'pr/2'
Update .gitignore