Honors --enable-introspection switch from introspection.m4
Fixes to GI: Avoiding warnings when compiling GIR to TYPELIB
Fixed issues on --enable-gda-gi and removed warnings on TYPELIB compilation
Removing non public API from GIR. Improving GIR generation and avoid warnings.
Fixed Debian Bug #708806
Misc compilation related issues fixed
Released version 5.0.4
Distribute Gda-5.0.metadata fixes Bug #701752. Avoid some warnings on Gdaui-5.0.gir generation.