Unconditionally add `-D` in avrdude options.

This is needed in Mega boards, because of a bug in Mega bootloader. See
https://github.com/sudar/Arduino-Makefile/issues/114#issuecomment-25011005
for detailed explanation.

Fix #114
Fix whitespace and line spacing

No change in functionality
Bump up version to v1.0.1 for release

This is just a minor bug fix release