GDB improvements
GDB improvements

Set up the same function keys that Eclipses uses in its debugger: F5 -> F8,
from slower to faster.

F5 = step into e.g. s.
F6 = step over e.g. n.
F7 = run to end of the function/frame.
F8 = continue.

steve-downey/dot.emacs,fcassirer/dot.emacs,psipika/exordium,philippe-grenet/exordium,jbibollet/exordium,pkryger/exordium