Alpha Version 0.3.0

This pull request updates privly-web to use Rails 4.2 instead of 3.2. The key points are below.

Ruby Version

• This drops support for older versions of Ruby. The version we are currently testing against is 2.2.2. You may need to update Ruby on your machine to run this version of privly-web.

Ruby Gems

• I added and removed many gems from the gemfile to comply with the changes. You will need to run bundle install with whatever version of ruby you are using.

Migrations

• I increased the length of the invitation token because the invitations library uses longer tokens. You need to run rake db:migrate.

Builds and environments

• The development and test environments should all work without incident, but migrating production environments can be challenging. Open an issue on GitHub to get assistance.