Merge pull request influxdata#71 from caoli5288/pull2

Set system time as point's default time.

Adopt Readme

[maven-release-plugin] copy for tag influxdb-java-1.5

[maven-release-plugin] copy for tag influxdb-java-1.4

[maven-release-plugin] copy for tag influxdb-java-1.3

[maven-release-plugin] copy for tag influxdb-java-1.2

[maven-release-plugin] copy for tag influxdb-java-1.1

[maven-release-plugin] copy for tag influxdb-java-1.0

Tag for version 1.0