rename gst-launch --> gst-launch-1.0
replace old elements with new elements(ffmpegcolorspace -> videoconvert, ffenc_** -> avenc_**)
fix caps in examples
https://bugzilla.gnome.org/show_bug.cgi?id=759432
* <refsect2>
* <title>Example pipelines</title>
* |[
- * gst-launch -v filesrc location=sine.ogg ! oggdemux ! vorbisdec ! audioconvert ! stereo ! audioconvert ! audioresample ! alsasink
+ * gst-launch-1.0 -v filesrc location=sine.ogg ! oggdemux ! vorbisdec ! audioconvert ! stereo ! audioconvert ! audioresample ! alsasink
* ]| Play an Ogg/Vorbis file.
* </refsect2>
*/