configure.ac: reorganize clean up document more remove cruft

configure.ac: reorganize clean up document more remove cruft

Original commit message from CVS:

* configure.ac:
reorganize
clean up
document more
remove cruft
* check/Makefile.am:
* docs/gst/Makefile.am:
* examples/helloworld/Makefile.am:
* gst/Makefile.am:
* gst/base/Makefile.am:
* gst/check/Makefile.am:
* gst/elements/Makefile.am:
* gst/indexers/Makefile.am:
* gst/parse/Makefile.am:
* libs/gst/controller/Makefile.am:
* libs/gst/dataprotocol/Makefile.am:
* examples/helloworld/helloworld.c: (event_loop):
compile fixes, though it's not being compiled currently