Rename "install" -> "get" and "update" -> "upgrade".

sdk/lib/_internal/pub/lib/src/command/get.dart

Index: sdk/lib/_internal/pub/lib/src/command/get.dart
diff --git a/sdk/lib/_internal/pub/lib/src/command/install.dart b/sdk/lib/_internal/pub/lib/src/command/get.dart
similarity index 56%
rename from sdk/lib/_internal/pub/lib/src/command/install.dart
rename to sdk/lib/_internal/pub/lib/src/command/get.dart
index ac17a6957cceb09a2376e3f760ba527c813d72b1..97db6c0703e8a27f0dd793114438974674225e6d 100644
--- a/sdk/lib/_internal/pub/lib/src/command/install.dart
+++ b/sdk/lib/_internal/pub/lib/src/command/get.dart
@@ -2,28 +2,28 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library pub.command.install;
+library pub.command.get;
 
 import 'dart:async';
 
 import '../command.dart';
-import '../entrypoint.dart';
 import '../log.dart' as log;
 
-/// Handles the `install` pub command.
-class InstallCommand extends PubCommand {
-  String get description => "Install the current package's dependencies.";
-  String get usage => "pub install";
+/// Handles the `get` pub command.
+class GetCommand extends PubCommand {
+  String get description => "Get the current package's dependencies.";
+  String get usage => "pub get";
+  final aliases = const ["install"];
 
   bool get isOffline => commandOptions['offline'];
 
-  InstallCommand() {
+  GetCommand() {
     commandParser.addFlag('offline',
         help: 'Use cached packages instead of accessing the network.');
   }
 
   Future onRun() {
-    return entrypoint.installDependencies()
-        .then((_) => log.message("Dependencies installed!"));
+    return entrypoint.getDependencies()
+        .then((_) => log.message("Got dependencies!"));
   }
 }