cmd/geth, jsre: updated ethereum.js => web3.js

.gitmodules

 [submodule "cmd/mist/assets/ext/ethereum.js"]
 	path = cmd/mist/assets/ext/ethereum.js
-	url = https://github.com/ethereum/ethereum.js
+	url = https://github.com/ethereum/web3.js

cmd/geth/js.go

@@ -118,7 +118,7 @@ func (js *jsre) apiBindings() {
 		utils.Fatalf("Error loading ethereum.js: %v", err)
 	}
 
-	_, err = js.re.Eval("var web3 = require('ethereum.js');")
+	_, err = js.re.Eval("var web3 = require('web3');")
 	if err != nil {
 		utils.Fatalf("Error requiring web3: %v", err)
 	}