Update Android roadmap
Merge pull request #427 from danielpassos/agdroid_roadmap

Update Android roadmap
updates release dates
Add google and fb jira tickets
Add cocoapods an dtravis tickets
Updating DataSync roadmap dates and doc.

Apart from the updated dates, Operation Transformation (OT) has been
remove as an option and we are focusing on Differential Synchronization
(DS).
Fixing header line and moving Offline to Q3.
Updating the ConflictResolution roadmap dates.
Merge branch 'roadmaps'
Updating SimplePush roadmap and including WebPush.