Warning free build on java-8. Corrected javadoc.
Merge pull request #11 from shasts/cleanup/javadoc-correction

Cleanup/javadoc correction
Update some more Javadoc and formatting
lol, Java 8 Javadoc
switch time measurement over to System.nanoTime() for internal implementation, public API's shouldn't be affected #15
Merge pull request #16 from rholder/15-nanotime-duration-checking

switch time measurement over to System.nanoTime() #15
update HISTORY.md for release 1.0.6
update README.md for release 1.0.6
prepare for release 1.0.6
bump up to 1.0.7-SNAPSHOT
update Gradle wrapper to 1.11