docs: add link to python porting doc and app dev manual to porting-to-1.0.txt
docs: add link to python porting doc and app dev manual to porting-to-1.0.txt

lovebug356/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,collects/gstreamer,cfoch/gstreamer,jpakkane/gstreamer,krichter722/gstreamer,cablelabs/gstreamer,cablelabs/gstreamer,lovebug356/gstreamer,collects/gstreamer,cfoch/gstreamer,jpakkane/gstreamer,lubosz/gstreamer,ensonic/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,justinjoy/gstreamer,jpxiong/gstreamer,centricular/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,surround-io/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,cfoch/gstreamer,surround-io/gstreamer,krieger-od/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,mparis/gstreamer,justinjoy/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,jpakkane/gstreamer,centricular/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,collects/gstreamer,lovebug356/gstreamer,ensonic/gstreamer,centricular/gstreamer,mparis/gstreamer,jpxiong/gstreamer,lovebug356/gstreamer,surround-io/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,krieger-od/gstreamer,cfoch/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,mparis/gstreamer,collects/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,collects/gstreamer,lubosz/gstreamer,cfoch/gstreamer,mparis/gstreamer,cablelabs/gstreamer,krieger-od/gstreamer,justinjoy/gstreamer,krieger-od/gstreamer,lubosz/gstreamer,surround-io/gstreamer,Lachann/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,lovebug356/gstreamer