Made the default build target "most" which currently contains everything except

dart.gyp

Index: dart.gyp
diff --git a/dart.gyp b/dart.gyp
index 7f5ec3057ee94e474a26d53804e0f1a328ca5d6d..982412f53da460777e08f270640889424d85f02f 100644
--- a/dart.gyp
+++ b/dart.gyp
@@ -5,6 +5,33 @@
 {
   'targets': [
     {
+      # Contains all dependencies.
+      'target_name': 'everything',

[kustermann, 2013/03/27 10:21:21]

There should be no need for an 'everything' target. AFAIK gyp will generate
automatically an 'all' target (that's the on used if you run just
'./tools/build.py') -- which builds all targets.

[Andrei Mouravski, 2013/03/27 17:45:40]

I was following the example of skia:
https://code.google.com/p/skia/source/browse/trunk/gyp/?r=6409
I realize 'all' runs all targets, but it's named differently on MacOS, which is
silly, so this solves that problem... sort of.

[kustermann, 2013/04/02 10:34:25]

I wasn't aware that it's named differently on Mac. So please keep the everything
target you had earlier (this way we don't need to pass 'All' on mac on 'all' on
the other platforms in the buildbot configuration).

+      'type': 'none',
+      'dependencies': [
+        'most',
+        'api_docs',
+      ],
+    },
+    {
+      # Contains all the dependencies that will run by default.
+      'target_name': 'most',

[kustermann, 2013/03/27 10:21:21]

The name 'most' is not really descriptive. If somebody invokes
'./tools/build.py most', he has no idea what targets will be built.

[Andrei Mouravski, 2013/03/27 17:45:40]

Is 'default' better?

[kustermann, 2013/04/02 10:34:25]

I like 'default'.

+      'type': 'none',
+      'dependencies': [
+        'compiler',
+        'runtime',
+        'create_sdk',
+        'upload_sdk',
+        'dart2js',
+        'analyzer',
+        'dartc_bot',
+        'dart2js_bot',
+        'editor',
+        'samples',
+        'packages',
+      ],
+    },
+    {
       'target_name': 'compiler',
       'type': 'none',
       'dependencies': [