Citations requests #7

Update iOS demo app
Update demo app Pods, clean Pods documentation
Add fetch articles details method #8

Improve demo iOS app interface
Improve detailed articles parsing
Update Pods
Improve detailed articles parsing

Add ISO8601DateFormatter dependency
Reformat code
Add API rate limit properties, #6
Update README with ISO8601 dependency
Merge pull request #9 from shazino/development

Version 1.0