D-15000: remove code that passes in timestamp, let DB generates them
D-15000: add feedheadDelay parameter, feed head fetch will fetch entries n seconds older than now
Merge pull request #254 from shintasmith/D-15000

D-15000: race condition issue causing missed events
[maven-release-plugin] prepare release parent-1.2.12
[maven-release-plugin] prepare for next development iteration