Merge pull request #101 from burstly/dev

Added ad size documentation in Android Guide
Merge pull request #102 from burstly/dev

Fix iOS release notes
Merge pull request #103 from burstly/dev

Fixed Burstly log levels in iOS Guide
Updated images for iOS Guide and Configuring and Managing page
Merge pull request #104 from burstly/dev

Updated Configuring and Managing content, and updated image paths
Merge pull request #105 from burstly/dev

Made minor changes.
Merge pull request #106 from burstly/master

Added images to res folder.