Code YUI module naming conventions

Please fix the following inconsistencies between module directories,
module names, and namespaces as described in the JavascriptReviewNotes.

https://dev.launchpad.net/JavaScriptReviewNotes#Naming%20Javascript%20Modules%20and%20Namespaces

Also, please run ./bin/jslint on the modified javascript files.

c/l/javascript/code/branchstatus.js:
    YUI.add('code.branchstatus', function(Y) {
        Y.branchstatus = Y.namespace('code.branchstatus');
        Y.branchstatus.connect_status = function(conf) {

    For example, the above code should be changed to:
        YUI.add('code.branchstatus', function(Y) {
            var module = Y.namespace('code.branchstatus');
            module.connect_status = function(conf) {

c/l/javascript/code/popupdiff.js:
    YUI.add('code.branchmergeproposal.popupdiff', function(Y) {
        var popupdiff = Y.namespace('code.branchmergeproposal.popupdiff');

c/l/javascript/code/branchsubscription.js:
    YUI.add('code.branchsubscription', function(Y) {
        Y.branchsubscription = Y.namespace('code.branchsubscription');

c/l/javascript/code/branchmergeproposal.js:
    YUI.add('code.branchmergeproposal', function(Y) {
        Y.code.branchmergeproposal = Y.namespace('code.branchmergeproposal');
        Y.code.branchmergeproposal.connect_status = function(conf) {

c/l/javascript/code/branchlinks.js:
    YUI.add('code.branchlinks', function(Y) {
        Y.branchlinks = Y.namespace('code.branchlinks');
        Y.branchlinks.connect_branchlinks = function() {

c/l/javascript/code/codereview.js:
    YUI.add('code.codereview', function(Y) {
        Y.codereview = Y.namespace('code.codereview');
        Y.codereview.connect_links = function() {
        Y.codereview.NumberToggle = NumberToggle;