code cleanups and doc fixes
code cleanups and doc fixes

Original commit message from CVS:
code cleanups and doc fixes

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