add a API for purging cubes
add purge cube in front page
Merge branch 'master' of https://github.com/KylinOLAP/Kylin
exclude a few files in coverage test
rename package to com/kylinolap/jdbc
Merge branch 'master' of https://github.com/KylinOLAP/Kylin
Merge branch 'master' of https://github.com/KylinOLAP/Kylin
reload page after purege
show link in admin page
clean unused hbases
refactor JobInstanceBuilder to make creating JobInstance more clear
refactor JobInstance to return JobSteps on List not Vector, and change its accessibility
Merge pull request #56 from qhzhou/hll_inc_build_merge

refactor