Jobsworth 5.0 milestone 1

[Ari Maniatis]

I've pushed out a first release of jobsworth now upgraded from Rails 3 to Rails 4.2. What a huge job this has been!

https://github.com/ari/jobsworth/releases/tag/5.0M1

* Rails upgraded to 4.2.x along with major upgrades to many gems. This resolves some security issues with running the old version of Rails now EOL.
* Better display of milestone and task forecast dates
* Milestone starting date
* JRuby upgraded to 9.1 with the promises of better performance
* Support for MRI ruby versions below 2.2 is now dropped
* Support logstash
* Lots of improvements to security. No known security holes existed before, but now there are more checks, explicit routes and explicit params which can be modified
* Fix invalid timezones for some users


I'm already using this release in production, so it has no major issues I know of. Please go ahead and report any bugs you might find.

As for new features, the work on 5.0 before we get to final release will mostly be around dates and forecasts of milestones. So better ability to predict and schedule your team's workload.

I'd like to thank Zaid for getting us started on the Rails 4 upgrade and to Andrei (@k41n) for getting us all the way there and solving some tricky problems.