Modualize terminals, pluginize terminal emulator, add term.js

[ysangkok]

This improved upon pull request #47 with the proposed changes and also handles Unicode correctly. It addresses issue #46 .

It still requires patched term.js with the following patch:

diff --git a/src/term.js b/src/term.js
index f26617d..c061e36 100644
--- a/src/term.js
+++ b/src/term.js
@@ -464,9 +464,9 @@ Terminal.prototype.initGlobal = function() {
   }
   Terminal._boundDocs.push(document);

-  Terminal.bindPaste(document);
+  //Terminal.bindPaste(document);

-  Terminal.bindKeys(document);
+  //Terminal.bindKeys(document);

   Terminal.bindCopy(document);

[s-macke]

Accepted, but I might change a lot to prevent further chaos.