Apple II assembly $0803 start hard coded, but not apparent to user

[fredsa]

When getting started with assembly for the Apple II (and perhaps this also applies to the C workflow) in 8bitworkshop, one can get very confused and thrown off by the hidden hard coding of $0803 as the start address.

As a user, I'd expect to be able to just add org $2000 to the top of my program in order to write code that will execute there:

	processor 6502
	org $2000

start	jmp start

In order of preference:

1. Allow different start addresses, i.e. it all "just works"
2. An affordance (compile error?) in the IDE if you change the default start address for the code segment
3. Update the File > New code snippets to document the importance of $0803 in code, e.g.

	org $803	; DO NOT CHANGE, required starting address