Merge pull request #132 from markemmer/master

SDS: Support simulator's new NEXT command to step over subroutine calls
SDS: Add -f switch to Next command to force step-over mode

Add -f switch ("force") to the Next command to set the temporary breakpoints regardless of instruction type.  This is useful at
the bottom of loops or to avoid going off into unrelated code should an interrupt or memory paging trap occur.
Merge git://github.com/simh/simh