Multi-parameter Strings

This release adds support for

• strings containing multiple inner parameters, and
• handling of extra white space around parameters.

For example:

it("should compute template for a string with multiple inner parameters", function() {
  var template = parse("Hello {{firstName}} {{lastName}}, how are you ?");
  assert.deepEqual(template.parameters, [{ key: "firstName" }, { key: "lastName" }]);
  assert.equal(template({ firstName: "Jane", lastName: "Doe" }), "Hello Jane Doe, how are you ?");
});

it("should handle extra whitespace", function() {
  var template = parse("Hello {{firstName }} {{ lastName}}, how are you ?");
  assert.deepEqual(template.parameters, [{ key: "firstName" }, { key: "lastName" }]);
  assert.equal(template({ firstName: "Jane", lastName: "Doe" }), "Hello Jane Doe, how are you ?");
});

See #6