Allow command line compilation when using BEEPER.
Fix location of avrdude.conf
Merge pull request #520 from henrikbrixandersen/Makefile-fixes

Makefile fixes
added Azteeg X1 motherboard
Merge pull request #521 from lajos/azteeg_x1

added Azteeg X1 motherboard
fixed compile error in ultralcd.cpp when PIDTEMP undefined
fixed another !defined(PIDTEMP) compile in ultralcd.cpp
Merge pull request #525 from lajos/ultralcd_pid

ultralcd.cpp compile errors when !defined(PIDTEMP)