core: remove unused ISO-8859-centric monobyte mode from vlc_wraptext()

extras/contrib/src/Makefile: cleaned up INSTALL_NAME macro for MacOS X: all the dylib in contrib/lib are soft-linked to their distributed version in 'vlc-lib'. this way, VLC build system can use contrib libs on MacOS X the same way as for UNIX, and should simplify porting to libtool
configure.ac: cleaned up Cocoa.h detection, removed link path dependency to 'vlc-lib' as it is no longer necessary
Makefile.am: fixed installation of dylibs as vlc_ prefix is already appended by INSTALL_NAME

NOTE: this change is highly disruptive for MacOS X build, I strongly recommend that you rebuild the contrib packages for this platform. Other platforms are unaffected

contrib/Makefile: dereference the symlink. a better solution would be to transform the absolute one to relative.

* fixed a minor memory leak (the timer wasn't released after invalidating it)
* VLCInfo is o_info_window's delegate now

ctrl_tree.cpp: fix selection bug (when pressing KEY_DOWN if the selected item was the last visible tree item)
playtree.hpp: cosmetics

- Remove vlc_dcgettext in those cases

We can now DnD a file everywhere on the playlist dialog. Droping above the tree will insert at the begining of the playlist. Droping under the tree will insert at the end of the playlist.

playlist.cpp, playlist.hpp: fix segfault when destroying playlist drop target (and use the wxDnD*Locale functions).
interface.cpp, wxwidgets.hpp: put courmisch's fixes to the DnD encoding issue in wx into wxDnDFromLocale and wxDnDFreeLocale

dialogs/playlist.*: Add File Drop in playlist handling. (Still needs to include courmisch's wx encoding fix when the fix gets fixed)