Make Doxygen ignore `G_{BEGIN,END}_DECLS` and `GEANY_API_SYMBOL` itself
instead of stripping those manually when parsing the XML output.
This makes Doxygen parsing more robust by ignoring some odd C syntax,
and also improves the HTML version removing some incorrect C code
references.
- do not write out scintilla_object_* functions
- remove scioutput file parameter
- do not open output file until after xml parsing to avoid stale files
- fixed simplesect handling
- handle output being a pipe to head or tail
The script reads the doxygen xml output and generates two headers (optionally
a single header) that contains all of the plugin API in gtk-doc format.
Two headers because it's preferrable to group Scintilla related stuff
into its own namespace. This is a lot easier if g-ir-scanner can
work with a separate header file. If we change minds later on the script is
prepared to generate only one header.
