Add Jasmine package

This PR adds a single Jasmine package, which is a merge between the two existing packages following up [pull request 3390](https://github.com/wbond/package_control_channel/pull/3390).
 
I don't want to make things more cumbersome, but I submitted the PR in case that this still looks like a good idea (keeping in mind that both packages have quite a lot of users).

The former owners of the merged packages are @gja and @caiogondim.

Sorry for the delay!