Ensure that _.templateSettings are set correctly.

If _.templateSettings are overridden to change the syntax (i.e. handlebars) by another library, then the templating settings are broken for bbGrid which relies upon the default template settings.

// Underscore Default
_.templateSettings = {
  evaluate    : /<%([\s\S]+?)%>/g,
  interpolate : /<%=([\s\S]+?)%>/g,
  escape      : /<%-([\s\S]+?)%>/g
};

// Handlebars like syntax
_.templateSettings = {
  interpolate: /\{\{(.+?)\}\}/g,
  evaluate: /\[\[(.+?)\]\]/g
};