Only log the tag and the message from Android, so logs look like “ANDROID: I/sky     : Hello from Sky!”.

Make it possible to start a sky app in an arbitrary relative path, rather than requiring the dart file to be in the current directory.

Refactors a bunch of Android-related things into an AndroidDevice singleton class.

Also clean up some formatting issues.

Have “sky_tool listen” start with a refresh so that iOS devices don’t wait on a black screen for the first filesystem change.

Fixes #454.

Make sky_tool install to ios devices and simulators if available, and add a ‘listen’ command that will listen to filesystem changes in the current directory and update running versions of the app.

Also refactors ios_sim.py to be part of sky_tool.

The current skyx file that ‘listen’ generates does not contain material design icons, so icons will be missing.

We seem to have trouble killing sky_server by its pid. Instead, lets try
killing it by looking up which process is listening on the sky_server port.

directory to support using sky_tool with local
builds.

The --checked argument runs SkyShell in checked mode, which turns on type
checking and asserts.

restart Sky apps on Android without having to restart SkyShell.

B=Fixes #187

We were walking over to the realdir too quickly, which meant we lost which
version of the sky_engine package we were supposed to use.

We now just symlink the lib directory into the packages directory in the output
directory.

This CL introduces a SkyShell.apk that is separate from the SkyDemo.apk that we
upload to the store to show our demos.  The SkyShell.apk is just an empty shell
that can run Sky applications on Android.