[OSX] Fix minor memory leak in ZeroconfOSX.cpp
pvr: do not buffer canpause/seek, the server may want to change this
Merge pull request #2437 from FernetMenta/canseek

pvr: do not buffer canpause/seek, the server may want to change this
depends: fixup paths after f32039928
Merge pull request #2433 from tru/zeroconf_memleak

[OSX] Fix minor memory leak in ZeroconfOSX.cpp
[osx/ios] - fix build with old darwin-depends by exporting YASM via config.site (should fix billy for osx)
depends: fix typo, don't create tool_dir
depends: Prepend -target to staging to avoid clashes with old deps

Also, fix a few missed ARCHS -> CURRENT_ARCH
depends: add setuptools for build-side python
depends: add distutilscross for building host python modules
depends: add PIL dependency
depends: add PIL dependency, but don't build by default yet
depends: use distribute rather than setuptools. Thanks ulion
depends: fix pil include path, it's not guarded from system libzip
depends: python: fix urllib on darwin
VideoRenerers: add buffering
add buffering for GLES
WinRenderer: add buffering
DXVA: activate buffering in renderer
linuxrenderer: delete all textures on reconfigure