Ammendments to pull request...

removed debug statements.
slight refactoring of symbol accessors.
ammendments to divergence from project coding style.

	modified:   simavr/sim/sim_avr.h
	modified:   simavr/sim/sim_core.c
	modified:   simavr/sim/sim_elf.c
Removed whitespace.

	modified:   simavr/sim/sim_elf.c