Sometimes "adb devices" prints a header. We should skip over the header
instead of complaining that we don't recognize it.

Fixes #1293

Before we didn't know how to find the packages of random files. Now we do.

Fixes #1213.

Makes it more obvious that flutter analyze takes a long time.

@Hixie

Fixes #1084

Catch the error and log a warning.

Fixes #1050

Previously it died with a confusing exception.

@chinmaygarde

This is yet another hack on top of adb log handling.
This is fragile, but w/o this if you device time is out
of sync, you can't trace.

@abarth

Fixes #1010

We now create a .atom folder to hold settings for the Atom project. We
should gitignore that folder our project template.

update the min api level in the generated android manifest; use constants for the android version name

Fixes #1034, at least for start and listen.

Add a 'flutter ios --init' command that fetches the Xcode project from the cloud and configures it for a given flutter project

I screwed up my last change, turns out the package command
is sensitive about having all of its flags before args.

Also made it possible to control the resources directory
from the command line per the review comments in the previous change.

@jason-simmons

I also made it so that `flutter apk -v` showed what
commands it was running by moving off of a custom _run
function onto the base/process.dart runChecked shared
by other commands.

@jason-simmons

Instead of failing with a cryptic error message about app.flx, we now fail with
an explicit message about the compiler.

Releated to #865

Fixes #858

We've been bulding these binaries using Travis for a while. We can start using
them now.

- strengthen analyzer against error messages that point past the
  bottom of the file.

- ignore any errors in intl's auto-generated files.

@chinmaygarde

iOS takes a different codepath and will need more work.

@chinmaygarde

Now you can run tests with and without --flutter-repo with a prebuilt binary on
Linux.

Fixes #307