Docs: more 0.13 cleanup

* Drop dependOn, dependsOn.  These are rarely the right method to call.
* Drop references to ~= in favor of just :=.
* Drop a .scala example where a .sbt example suffices.
Fixes #706 - Binary Compatibility lost in Launcher.

This checks to see if the new `crossVersionedValue` is actually implemented
by an AppID and delegates to the deprecated `crossVersioned` method if
there are any issues.   This preserves the binary compatibility from
folks using Launcher interface pre-0.13 and post-0.13.
clean up 'inspect' command and limit Related section to 10 keys