1. Added WITH_SPICE CMake variable. If it is not set usual Qucs will be
built. Application name is set to "qucs". If it is set, Qucs-S will be
built. Application name will be to "qucs-s".
2. Removed hardoced resources paths in "/usr/share/qucs", etc and
application names. Now resource paths depends on application name.
Resources will be installed into PREFIX/share/qucs-s/ for Qucs-S
3. Introduced a special definition QUCS_NAME in config.h. It will store
real application name.
4. Disabled default Debug mode for CMake
5. Exclude qucsattenuator, qucsedit, qucsresocdes, qucstrans, and qucshelp
(except docs) from the build system when building with WITH_SPICE switch
applicationDirPath() was used before a QApplication was instantiated
so it returned an empty path. This caused the application language
files path to be computed incorrectly.
To have qucs in a relocatable directory (in Windows) it cannot rely
the prefix given at build time. This is actually a bug.
This patch let each tool find the language files at runtime, relative
to the location of the executable.
The text output console showing the detailed results of the filter
calculation can be now hidden/shown using a dedicated menu item.
Visibility of the output console is remembered across sessions using
the QucsSettings.
A status bar has also been added to show the status of the last
calculation
The filter schematic and the frequency response images are now shown
one below the other and not side by side, in order to reduce the
minimum window width required. Images were also centered and their
size made relative to the main input boxes sizes.
When switching to a band-stop filter (from low-pass or others) an
error message appeared on the console since slotUpdateSchematic()
was not initializing the schematic file name string to use and no
assignment to it was made until slotSwitchParameters() updated
the filter type. Now a default assignment is done so no transient
error occurs anymore.
Implement QSettings read/write on startup/exit, as for the other
tools. Set main window title and icon as in the other tools.
Correct Help window title.
A sqrt() function had an argument that often should have been
nominally zero but was sometimes negative, likely due to loss
of precision, when compiled without optimization.
The expression was simplified taking into account the
cancellation of various terms.
