* Fix item add in RC

Several people use it and nobody complain it was broken.
Besides, some stuff seem not to work without it.

  this needs to be tested

* more synchronization with playlist and input threads
* new libvlc functions binded

* video.c: added 1 release object in GetVout
* input.c: added libvlc_get_input_thread helper

* video height/width retrieval
* input playing status check

* Add notify plugin

Thanks to xtophe

* libvlc playlist play uses locking

Automake 1.5 and 1.6 both suck, and 1.7 is almost four years old, so there is really no excuse for not using a decent version. Besides, there seems to some problems while building the loader with old Automake versions.

This simplifies the build system quite a lot, and reduce compilation
times when PIC is actually needed.

If you really mind the extra overhead of PIC, use:
./configure --enable-libtool --enable-static --disable-shared