Align Date implementation between Java and C++

[asfimport]

Currently C++ treats it as an int32 (no interpretation specified) and Java as an int64 with (rounded) milliseconds since 1970 but only the date (year, month, day) part actually being defined.

Reporter: Uwe Korn / @xhochy
Assignee: Uwe Korn / @xhochy

Related issues:

• [Python] Review GIL release and acquisition in to_pandas conversion (is related to)

_{Note: This issue was originally created as ARROW-420. Please see the migration documentation for further details.}

[asfimport]

Uwe Korn / @xhochy:
This is the implementation part of https://issues.apache.org/jira/browse/ARROW-413 as I don't want to have this differing implementation between Java and C++ in the 0.2 release.

[asfimport]

Uwe Korn / @xhochy:
PR: #238

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 238
#238