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
B-56355 - Improve the performance of "last" page

For all requests with marker = "last"
- Removed the SELECT COUNT(*) ... query; now uses default page size for all adapters.
- Ensured/added shouldGetFeedWithLastMarker() test for all adapters.
Merge pull request #255 from usnavi/B-56355_last

B-56355 - Improve the performance of "last" page
[maven-release-plugin] prepare release parent-1.2.13
[maven-release-plugin] prepare for next development iteration