docs/manual/: Update for 0.10: s/0.9/0.10/; s/audioscale/audiorsample/; add converters in front of pipelines; remove ...

Original commit message from CVS:
* docs/manual/advanced-dataaccess.xml:
* docs/manual/appendix-checklist.xml:
* docs/manual/appendix-programs.xml:
* docs/manual/basics-pads.xml:
* docs/manual/highlevel-components.xml:
* docs/manual/manual.xml:
Update for 0.10: s/0.9/0.10/; s/audioscale/audiorsample/;
add converters in front of pipelines; remove curly
brackets for threads stuff, they no longer exist; use
GST_TYPE_FRACTION for framerates; update some pieces of
code to 0.10, but there's plenty more to do.
* docs/manual/appendix-porting.xml:
Expand on asynchroneous state changes; s/0.9/0.10/;
mention disappearance of gst_init_get_popt_table()
(fixes #322916).