The shell properties toolbox is completely redesigned:
This dialog box offers a field for a command line and three check buttons
to generate and save various files before the command is run.
If the fourth checkbox, "use settings in .fl design files" is checked,
all shell settings will be store in the current .fl file, and they will
be read and restored when the .fl is loaded again.
Fluid will save different shell settings for different operating system as
it is common that a different OS requires a different shell command.
Fluid comes with default shell settings. Pressing the "save as default" button
will store the current setting in the Fluid app settings and are used for new
designs, or if the "use settings..." box is not checked.
Fluid app settings are saved per user and per machine.
tl;dr : making Fluid maintainable, no changes in code execution and logic.
This is a pretty extensive restructuring of the Fluid source tree.
It was neccessary because source and header files were getting
much too big to handle. Many source files had no header, and many
headers declared functions that were in diffrent source files.
Reorganized much of the include statements.
Added comments to some of the files.
Added Doxygen configuration file for standalone Fluid docs.
Tested everything by rebuilding Fluid .fl designs with the resorted
version of Fluid.
