2016-01-04:
bugfixes
========
resize window to 0 -> stack trace
select in options menu -> mouse mode = 0

improvements
============
a grid is shown

all shortcuts work
  'A';AntennaElm
  'a';OpAmpElm
  'c';CapacitorElm
  'd';DiodeElm
  'f';NMosfetElm
  'g';GroundElm
  'i';CurrentElm
  'I';InverterElm
  'j';NJfetElm
  'l';InductorElm
  'L';LogicInputElm
  'M';LogicOutputElm
  'm';MemristorElm
  'O';OutputElm
  'p';ProbeElm
  'R';RailElm
  'r';ResistorElm
  'S';Switch2Elm
  's';SwitchElm
  'T';TransformerElm
  't';NTransistorElm
  'v';VoltageElm
  'w';WireElm
  'x';TextElm
  'z';ZenerElm

circuitChanged behaves right (I hope)
can move elements with arrow keys
Alt+TAB (Alt+Shift+TAB) cyclic selects elements

Help->Keyboard Shortcuts
    reads file shortcuts.txt
