Update indentation style in setInitial functions
Fix setInitialDE from clobbering value passed to it
Preserve value of HL upon thread-not-found error in setInitial routines
Revert "Preserve value of HL upon thread-not-found error in setInitial routines"

This reverts commit 7e0e324fb1315fcd95dca37806a04b1b35b71223.
Actually fix register destruction in setInitial routines
Add setInitialBC routine
Add setInitialIX and setInitialIY
Merge branch 'setinitial'