Update cintrib doc
Add checkstyle for google convention and site template
add to pom checkstyle plugin
update marckdown :: convention
Update shell ::: convention code
update spark :: code convention
Updare zeppelin-server :: convention style
Update zeppelin zengine :: code convention
Check code indentation.
Turn on failOnViolation
Fix indentation
Merge pull request #225 from NFLabs/indentationCheck

Check code indentation.
Merge pull request #215 from NFLabs/letsBeCrazy/addConvention

Add to Zeppelin coding convention