Add Doc for new typefind method.
Add Doc for new typefind method.

shelsonjava/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,krieger-od/gstreamer,Lachann/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,collects/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,ensonic/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,drothlis/gstreamer,mrchapp/gstreamer,justinjoy/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,surround-io/gstreamer,lubosz/gstreamer,ahmedammar/platform_external_gst_gstreamer,collects/gstreamer,shelsonjava/gstreamer,ylatuya/gstreamer,drothlis/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,ahmedammar/platform_external_gst_gstreamer,justinjoy/gstreamer,mparis/gstreamer,jpakkane/gstreamer,Distrotech/gstreamer,ahmedammar/platform_external_gst_gstreamer,ahmedammar/platform_external_gst_gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,Lachann/gstreamer,ylatuya/gstreamer,drothlis/gstreamer,krieger-od/gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,krieger-od/gstreamer,Lachann/gstreamer,mrchapp/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,mparis/gstreamer,cfoch/gstreamer,surround-io/gstreamer,Distrotech/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,krichter722/gstreamer,cfoch/gstreamer,centricular/gstreamer,ensonic/gstreamer,justinjoy/gstreamer,magcius/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,justinjoy/gstreamer,cfoch/gstreamer,drothlis/gstreamer,mrchapp/gstreamer,Distrotech/gstreamer,krichter722/gstreamer,ylatuya/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,lovebug356/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,jpxiong/gstreamer,magcius/gstreamer,mparis/gstreamer,collects/gstreamer,mparis/gstreamer,surround-io/gstreamer,Distrotech/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,ahmedammar/platform_external_gst_gstreamer,magcius/gstreamer,lovebug356/gstreamer,ylatuya/gstreamer,ensonic/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,mrchapp/gstreamer,centricular/gstreamer,surround-io/gstreamer,cfoch/gstreamer,krichter722/gstreamer,collects/gstreamer,ylatuya/gstreamer,jpakkane/gstreamer,drothlis/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,justinjoy/gstreamer,collects/gstreamer,lubosz/gstreamer,magcius/gstreamer,magcius/gstreamer,Lachann/gstreamer,mparis/gstreamer,krichter722/gstreamer,Distrotech/gstreamer,mrchapp/gstreamer