Use CORS for NTP sync
Merge pull request #76 from mnmtanish/cors-ntp

Use CORS for NTP sync
version bumped to 2.7.4
fix potential app crash
version bumped: 2.7.5
version bumped to 2.8.0
improve performance on pubsub netwokImpactTracking
 - removed stringifying again fields and uses the exisiting one
 - removed using fibers to carry out currentSub
changed tests according to the new networkImpact calculation
Merge branch 'fix-network-impact-tracking-issue'
version bumped: 2.8.1