Add Deno global namespace (#1748)

Resolves #1705

This PR adds the Deno APIs as a global namespace named `Deno`. For backwards
compatibility, the ability to `import * from "deno"` is preserved. I have tried
to convert every test and internal code the references the module to use the
namespace instead, but because I didn't break compatibility I am not sure.

On the REPL, `deno` no longer exists, replaced only with `Deno` to align with
the regular runtime.

The runtime type library includes both the namespace and module. This means it
duplicates the whole type information. When we remove the functionality from the
runtime, it will be a one line change to the library generator to remove the
module definition from the type library.

I marked a `TODO` in a couple places where to remove the `"deno"` module, but
there are additional places I know I didn't mark.

1 files changed, 7 insertions, 9 deletions

diff --git a/website/manual.md b/website/manual.md
index bf5f6d237..96f3b7971 100644
--- a/website/manual.md
+++ b/website/manual.md
@@ -69,8 +69,8 @@ formatters</a>.
 ### Browser compatibility
 
 The subset of Deno programs which are written completely in JavaScript and do
-not import the special `"deno"` module, ought to also be able to be run in a
-modern web browser without change.
+not use the global `Deno` namespace (or feature test for it), ought to also be
+able to be run in a modern web browser without change.
 
 ## Setup
 
@@ -228,13 +228,11 @@ In this program each command-line argument is assumed to be a filename, the file
 is opened, and printed to stdout.
 
 ```ts
-import * as deno from "deno";
-
 (async () => {
-  for (let i = 1; i < deno.args.length; i++) {
-    let filename = deno.args[i];
-    let file = await deno.open(filename);
-    await deno.copy(deno.stdout, file);
+  for (let i = 1; i < Deno.args.length; i++) {
+    let filename = Deno.args[i];
+    let file = await Deno.open(filename);
+    await Deno.copy(Deno.stdout, file);
     file.close();
   }
 })();
@@ -257,7 +255,7 @@ This is an example of a simple server which accepts connections on port 8080,
 and returns to the client anything it sends.
 
 ```ts
-import { listen, copy } from "deno";
+const { listen, copy } = Deno;
 
 (async () => {
   const addr = "0.0.0.0:8080";