Write AVR fuses slowly

DUDE_SPEED is optimized for max speed and may fail
if the clock source is set to the slow internal
RC clock generator
Merge pull request #130 from Edilbert/master

The firmware parser inserts filenames '*' for disk copy commands like
Dt=s (duplicate source to target) or Ct=s (copy * from source to target).
Merge branch 'master' of https://github.com/fachat/XD2031
Fix broken SD-card support for XS-1541 w/ m1284p
Make XS-1541 AVR fuses settings depend on the selected MCU
Make avrdude more quiet, enable verbose output with make <target> V=1
Really fix XS-1541 SD-card support
Add missing 'long' modifier to nvconfig debug code
Make the behavior of the '*' wildcard configurable

Closes #14
Use generic cc instead of gcc for firmware tests
Make test for name.c a feature, not a bug