This work allows us to move closer to replacing gtk-doc, among other
things. We add a generic attribute "introspectable", and inside the
typelib compiler if we see "introspectable=no", we don't put it in the
typelib. This replaces the hackish pre-filter for varargs with a much
more generic mechanism.
The varargs is now handled in the scanner, and we emit
introspectable=no for them.
Add generic metadata to Node with references to file/line/column,
which currently comes from symbols.
Add scanner options --Wall and --Werror.
Add a toplevel GirParser object to hold state that is global across
a compilation. Currently just holds the include path, but will
eventually also keep a cached list of parsed modules.
svn path=/trunk/; revision=901
