first steps for new table attributes title, source and license
fixed metadata dialog specs
CDB-4017
Merge branch 'CDB-4017' of https://github.com/CartoDB/cartodb into CDB-4017
CDB-4017 specs stabilization
CDB-4017 specs stabilization II
Merge pull request #737 from CartoDB/CDB-4017

Adding new table attributes title, source and license
Update README.md

Updated the contents as some were lacking context or there were missing commands.
Update README.md

Reformat and typos.
Update README.md

Authoring and clean up.
Update README.md
Merge branch 'master' into CDB-4006