Java: API documentation

[asfimport]

For developers using Arrow via Java, we should provide an automatically generated API documentation with a typical tool used in the Java world.

Reporter: Uwe Korn / @xhochy
Assignee: Wes McKinney / @wesm

Related issues:

• Arrow 0.3 release (blocks)

_{Note: This issue was originally created as ARROW-98. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
I added Javadoc support in #589 and published current version to http://arrow.apache.org/docs/java/

[asfimport]

Wes McKinney / @wesm:
Resolved in PR: 76d56d3