[osx] add icarus-verilog to the package
update PLATFORMS
[osx] update package builder
[osx] fix icarus package build
[osx] another update to packagemaker files
append QucsSettings.BinDir to QProcess PATH

Otherwise ASCO and qucsveri are not found on the path.
It was working because I had /usr/local/bin set on the path of my terminal.
removed some qDegub messages
[osx] fix remove path
set default asco, handle program not found

If ASCODIR is set on the environment use it.
Otherwise use /usr/local/bin.
Added a check before starting the process.
It should give users a clue if things are not where they should be.
Insert components by single click (like in qucs-0.0.16)
Added "Insert" popup menu item for schematic with subcircuit ports
Insert a schematic with subcircuit ports when single clicked (or Pressed), double click opens the schematic
set "Insert" popup menu item to invisible when schematic has no subcircuit ports
expand item "Schematics" in project tab by default