Add properties to output of dx describe [project] by default
Don't print messages about "make" when there's no makefile.

Same goes for ./configure.
Upgrade concurrent.futures dependency to 2.1.4
Upgrade ws4py dependency to 0.2.4
Upgrade argcomplete dependency to 0.5.7
Prevent stacktrace on lint errors with dx build --remote.
Remove obsolete options relating to prodauth/prodapi.
Add dxpy.user_info method and 'dx whoami' subcommand.
Obtain user ID when logging in with dx login --token.
Check that the app is writable before starting build process.
Fix broken test.
New option dx rm project -q/--quiet.
Reduce integration test noise.
Fix broken test.
Fix broken test, try 2.
Changelog and dxR version update for v0.63.0