Add test to check licenses.csv against datapackage.json

[Stephen-Gates]

Based on http://okfnlabs.org/blog/2016/05/17/automated-data-validation.html

Especially important if constraints are added to schema

[rufuspollock]

@Stephen-Gates +1 and you can use goodtables.io (or this will soon be integrated into the new release of datahub.io)

[Stephen-Gates]

Used goodtables.io for #57

[Stephen-Gates]

@rufuspollock can you set up goodtables.io to test [licenses.csv[(https://raw.githubusercontent.com/okfn/licenses/master/licenses.csv) against datapackage.json and add the badge link to the readme? I don't have rights to use this repo in GoodTables.

[rufuspollock]

@Stephen-Gates what would it take for you to get able to do that - i'd prefer to sort that than directly fix so that you are empowered on these things in the future.

/cc @mlinksva

[Stephen-Gates]

@rufuspollock I believe I'd need some level of rights to the repository to register it with GoodTables.io for continuous integration.

Edit: I need to access to add a web hook:

Edit 2: and this issue fixed in goodtables frictionlessdata/goodtables.io#277

[mlinksva]

@Stephen-Gates sent you an invite, accept and you should be able to add webhooks to this repo.

[Stephen-Gates]

Thanks @mlinksva, accepted and will now progress automating validation of csv using good tables.io and add a badge to the readme