Some experiment with statics files. Clone this in your .ipython/profile_default/static/custom and uncomment the extension you are interested in in custom/custom.js.

This is a simple workaround until we ship IPyton with requirejs.

Install

clone this repo into ~/.ipython_/profile_xxx/static/

git clone https://github.com/Carreau/ipython-static-profiles.git ~/.ipython/profile_default/static/custom

Edit ~/.ipython/profile_default/custom/custom.js to your convenance. That is to say, uncomment the extensions that interest you.

Restart your notebook server.

Details

The custom.js file in this branch contain a small load_ext function to help load extensions. Extension can either be a folder named after the extension containing a main.js script. or a simple javascrip file. you can eithe load an extension by name if it is in a folder, or by specyfying the full path if it ends with .js

IPython-nb-extensions

breakpoint - allow setting of breakpoints for notebook cells
hotkeys - add PGUP / PGDOWN / HOME / END hotkeys for fast scrolling in codecells
slideshow - add toolbar and visual hints to slideshow extension
history - add individual cell history (just a test...)
read-only - allow codecells to be set read-only, so no editing or celle execution is possible
shift-tab - assign shift-tab to dedent
codefolding - fold code blocks using Alt-F or clicking on line numbers
linenumbers - display line numbers in codecells using Alt-N
comment-uncomment - toggle comments in selected lines using Alt-C
split-combine - split/combine cells using Alt-S, Alt-A, Alt-B

The notebook extensions require patching IPython: Add line comment symbol to codemirror-ipython.js:

...
    var external = {
        lineComment: '#', // ** NEW **
        startState: function(basecolumn) {
...

Also, some patching of codemirror is required:

Correct CodeMirror.indentRangeFinder in CodeMirror/addon/indent-fold.js (https://github.com/marijnh/CodeMirror/pull/1122)

CodeMirror.indentRangeFinderA = function(cm, start) {
  var tabSize = cm.getOption("tabSize"), firstLine = cm.getLine(start.line);
  var myIndent = CodeMirror.countColumn(firstLine, null, tabSize);
  for (var i = start.line + 1, end = cm.lineCount(); i < end; ++i) {
    var curLine = cm.getLine(i);
    if ((CodeMirror.countColumn(curLine, null, tabSize) == myIndent)&&
          (CodeMirror.countColumn(cm.getLine(i-1), null, tabSize) > myIndent)){
      return {from: {line: start.line, ch: firstLine.length},
              to: {line: i, ch: curLine.length}};
    }
  }
};

Update CodeMirror/addon/fold/foldcolde.js from git repo
Update CodeMirror.defineExtension in CodeMirror/addon/comment/comment.js

  CodeMirror.defineExtension("uncomment", function(from, to, options) {
    if (!options) options = noOptions;
    var self = this, mode = CodeMirror.innerMode(self.getMode(), self.getTokenAt(from).state).mode;
    var end = Math.min(to.line, self.lastLine()), start = Math.min(from.line, end);
    if (to.ch == 0 && to.line > from.line) 
        {
        console.log(start, end);
        end--;
        }
    // Try finding line comments
    var lineString = options.lineComment || mode.lineComment, lines = [];
    var pad = options.padding == null ? " " : options.padding;
    lineComment: for(;;) {
      if (!lineString) break;
      for (var i = start; i <= end; ++i) {
        var line = self.getLine(i);
        var found = line.indexOf(lineString);
        if (found == -1 && (i != end || i == start) && nonWS.test(line)) break lineComment;
        if (i != start && nonWS.test(line.slice(0, found))) break lineComment;
        if (found > 1) break lineComment; // only mind comments at the start of the line
        lines.push(line);
      }