Add remaining Ruby snippets
By default a folder that does not contain a file `test.yml` is not testable. But you have to make sure the code will work in your machine.
The testable snippets in the following list are: _pricing_ and _security_.
- [x] client
- [ ] guides
- [ ] insights
- [ ] ip-messaging
- [ ] lookups
- [ ] monitor
- [ ] notifications
- [ ] **pricing**
- [ ] **security**
- [ ] stun-turn
- [ ] sync
- [ ] video
- [ ] voice
- [ ] wireless
/cc @joliveros, @juancarlospaco, @hortega
There is no need to add a Sinatra dependency -- the snippets that has code that includes dependencies like Sinatra are not testable -- If you ran some example that includes something like Sinatra, Flask an so on it will run forever unless you explicitly send to it a SIGINT which will interrupt the application, which makes the snippet untestable.
There are a few rules that determines if a folder is testable:
1. The folder must contain a _test.yml_ file which contains a propery `testable: true`.
1. The folder contain a file `meta.json` which specify if the examples in that folder are testable.
1. **If none of the previous files are present the folder is non testable**.