* Adding strings and design file to source view panel
* Fluid: Fixed source dir recursion, fixed relative image reading path.
* Renaming source_dir to designfile_dir in some functions.
In this first version, we assume that the code file is newer whenever it is written,
until the current design is modified in any way. So instead of a status bar at the bottom
of the main window, the title bar will now show the status of the design and the code at
the same place.
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.
