Docs:
* Don't advertise services whose support is broken in Adium with no fix in sight.
* Instead, add a list of third-party protocol plugins.
* Minor tweaks.
echo"PRODUCT_NAME is the name of the unit test bundle, not including the filename extension.">/dev/stderr
echo"Environment variables you may want to override:"CONFIGURATIONWRAPPER_EXTENSIONDEVELOPER_DIRDEVELOPER_LIBRARY_DIRDEVELOPER_TOOLS_DIRBUILT_PRODUCTS_DIR>/dev/stderr
echo'(See RunUnitTests(1) for what those variables do.)'>/dev/stderr