(jQuery template foreach) + (spaces around = in data-bind attribute) = exception

The HTML5 spec allows for any number of spaces between an attribute name and the equals sign, and between the equals sign and the attribute value.  Such as:

```xml
    <p class             =     
    
    "myclass" />
```
[HTML5 Source](http://dev.w3.org/html5/spec/Overview.html#attributes-0) (I can't find an explicit reference in the HTML 4.01 spec, but I haven't ever met a browser that didn't like spaces.)

I ran into an issue where I had an element with data-bind inside a template.  Here is the exact template, from my ColorPal project:

```xml
    <script id="CP_PaletteTemplate" type="text/html">
        <div id="cp-swatches"
             data-bind = "visible: palette_created()">
        {{each(index,hex) colors}}
        <div 
                class = "cp-border cp-swatch grid_3 " 
                   id = "cp-swatch-${index}" 
            data-bind = "style: { backgroundColor: hex }"> <!-- problem line -->
        </div>
        {{/each}}
        </div> <!-- /#cp-swatches -->
    </script>
```
Note the spaces on either side of the equals sign.  This resulted in:

    Uncaught Error: Unable to parse bindings.
    Message: ReferenceError: hex is not defined;
    Bindings value: style: { backgroundColor: hex }

Only the data-bind attribute inside the template's foreach loop was problematic.  `hex` *is* defined, and the exception goes away when I remove the spaces, like so:

    data-bind="style: { backgroundColor: hex }"

I have a fix to the data-bind regex (memoizeDataBindingAttributeSyntaxRegex) and will submit a pull request right away.  I just wish I knew what the strange interplay is between jQuery.tmpl's foreach and Knockout.