Updates all Landscape applications to use the
latest version of urbit-ob, from 3.1.1 to 4.1.2.
Removes urbit-ob from applications that don't
use it (Clock, Launch, Weather).
Compiled JS for all the above included in this
commit.
gulp.rename just copies files, leaving the original.
For minified files, this was navigated by not
tracking the -min.js files in git. However, when
deploying OTA, the -min.js files are still deployed
to all ships. This commit adds 'del' package,
and a task to clean up the -min files when done
for all current Landscape applications.
