Added escape option which if set to false disables escaping
Merge remote-tracking branch 'emanuelbsilva/master'

Brings in the original code from pull request #14 after reconciliation
with the newer code base.

Conflicts:
	README.md
	tasks/mustache_render.js
Unit tests for escaped, unescaped, and leakage

Adds the following unit tests to the suite:

- unescaped: checks that options.escape === false works properly
- escaped: checks that options.escape === true works properly
- mustache unchanged: checks that after running the test suite that the
  function for mustache.escape is back to how it was originally
Fixes to task implementation with escape option

Makes the following adjustments to the escape option handling:

- explicitly assign the mustache.escape reference to the original
  HTML-escaping function if 'escape' is set to true
- return the mustache.escape reference back to how it was once the
  target has finished running
- if the user passes an 'escape' that is not true or false, raise an
  exception
Extend escape option for user-defined functions

Allows the use of a user-defined custom escaping function to be passed
into the 'escape' option, adds a unit test, and updates the
documentation.
Merge branch 'escape-option'

Brings in support for the new `escape` option, allowing users to disable
the built-in Mustache escaping or specify their own.

Fixes #24.
Closes #25.
Closes #14.
Bump version and update change log

Brings the plug-in to 1.7.0, with updated notes in the change log.