* instances creation/deletion stuff to libvlc-common.c
* implementation of the old libvlc API to libvlc.c

vlc_t => libvlc_int_t

Also, make it clearer what is shared and instance-specific

So,
libvlc_t ==> libvlc_global_t
vlc_t ==> libvlc_int_t (internal instance)

p_object->p_libvlc ==> p_object->p_libvlc_globale
p_object->p_vlc ==> p_object->p_libvlc

VLC_OBJECT_VLC ==> VLC_OBJECT_LIBVLC

And by the way, there is some cleanup required :) (ie, some things are created in the global object instead of the instance-specific one)

Remove the "seeking too far" error, as it happens for broken AVI and is quite confusing

- ActiveX: support for libvlc and common scripting APIS, widl has replaced midl as default IDL compiler

Will have to be updated/factorized when new chain and filter stuff is in.

Object::connect: Parentheses expected, signal QTimer::timeout

* Add a CONNECT macro for simple signal->slot connections 
* Untested save support in simple preferences

(untested)

* Remove i18n_string stuff

Provide trivial work-around for users of obsolete autoconf

- configure.ac: autoconf 2.59c is not yet supported in Cygwin, added Wine support for ActiveX plugin

    (fixed more coding style, and resolved a conflict I introduced)

(you don't expect me to actual try to compile VLC on puma.cti.ecp.fr, do you?)