Merge pull request #1 from jaapandre/master

removed non identifying organisation code
[#2] Add OrganisationRegistrationAgency list
[#2] Update Registration Agencies codelist to be more consistent

Update metadata
public-database is now an attribute and an xml boolean
website is now url
country is now a category
iati-usage-rules is now description
Merge branch 'organisation-registration-agency', fixes #2
Update multilateral category to be XM, consistent with prefix
Add english codelist names to metadata

IATI/IATI-Codelists#12
IATI/IATI-Standard-SSOT#21
Add .travis.yml
[IATI/IATI-Standard-SSOT#28] Add names/descriptions to category codelists
[IATI/IATI-Codelists#12] Add source urls to metadata
Add US NGA Feature Designation, fixes #6
Add a README, fixes #5
Document use of XM, fixes #3
Update travis github branch information, fixes #4
[#7] Import IANA Media Types
[#7] Add FileFormat categories
[IATI/IATI-Codelists#21] GeographicFeatureDesignation -> LocationType
[#10] Add contact information to Registration Agency list description
[IATI/IATI-Standard-SSOT#7] Add LICENSE
Pluralise codelists names consistently
Update text explaining OrganisationRegistrationAgency is NonEmbedded