Gruntfile Cleanup & Documentation

refs #2622, refs #1340

- added documentation to grunt tasks which will replace the wiki page, including reordering the tasks to make the documentation easier to read
- removed grunt changelog which is no longer used
- merged jshint:shared into jshint:server
- cleanup of quote marks, formatting, line lengths etc
- also fixed the incorrect version number for grunt-docker
- added route tests to coverage