Replace the switch plugin with the selector plugin. Add output-selector as the opposite of input-selector (was switc...

Original commit message from CVS:
* configure.ac:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-bad-plugins-docs.sgml:
* docs/plugins/gst-plugins-bad-plugins-sections.txt:
* docs/plugins/gst-plugins-bad-plugins.args:
* docs/plugins/gst-plugins-bad-plugins.hierarchy:
* docs/plugins/gst-plugins-bad-plugins.interfaces:
* docs/plugins/gst-plugins-bad-plugins.signals:
* docs/plugins/inspect/plugin-metadata.xml:
* docs/plugins/inspect/plugin-selector.xml:
* docs/plugins/inspect/plugin-soundtouch.xml:
* docs/plugins/inspect/plugin-switch.xml:
* gst/selector/.cvsignore:
* gst/selector/Makefile.am:
* gst/selector/gstinputselector.c:
* gst/selector/gstinputselector.h:
* gst/selector/gstoutputselector.c:
* gst/selector/gstoutputselector.h:
* gst/selector/gstselector-marshal.list:
* gst/selector/gstselector.c:
* gst/selector/selector.vcproj:
* gst/switch/.cvsignore:
* gst/switch/Makefile.am:
* gst/switch/gstswitch-marshal.list:
* gst/switch/gstswitch.c:
* gst/switch/gstswitch.h:
* gst/switch/switch.vcproj:
* tests/icles/.cvsignore:
* tests/icles/Makefile.am:
* tests/icles/output-selector-test.c:
Replace the switch plugin with the selector plugin. Add output-
selector as the opposite of input-selectoo (was switch). Add a test
for output-selector. Add docs for the elements. The vcproj needs
update. Fixes #500142.