CDB-4020
Merge pull request #734 from CartoDB/CDB-4020

CDB-4020
CDB-4020
Added mixpanel event for failed and completed imports and creations
Merge pull request #735 from CartoDB/CDB-4020

CDB-4020
first steps for new table attributes title, source and license
CDB-4021
fixed metadata dialog specs
CDB-4017
Merge branch 'CDB-4017' of https://github.com/CartoDB/cartodb into CDB-4017
Merge pull request #738 from CartoDB/CDB-4021

CDB-4021
Merge pull request #736 from CartoDB/CDB-4018

Added mixpanel event for failed and completed imports and creations
CDB-4017 specs stabilization
CDB-4006
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