Remove reverend in favor of path-to-regexp.compile for makePath()

Changes in this release only affect internal implementation of makePath(), and should be transparent to routr library users.

[https://github.com//pull/23] - remove reverend in favor of path-to-regexp.compile. Thanks a lot to @jasisk for going out of his way to update for us!
[https://github.com//pull/26] - cache compiled route paths from path-to-regexp.compile