Merge pull request #60 from ljacomet/issue-59

Issue #59 Move from travis-ci to jenkins@cloudbees
 #54 import latest CHMv8 code from Concurrency JSR-166 Interest Site (http://gee.cs.oswego.edu/dl/concurrency-interest/index.html)
 #54 port CHMv8 code + add our tests
 #54 change HeapCache to use CHMv8