[Python] Attach proper tzinfo when computing boxed scalars for TimestampArray

[asfimport]

Currently, the returned datetime.datetime/pandas.Timestamp objects are always tz-naive

Reporter: Wes McKinney / @wesm
Assignee: Wes McKinney / @wesm

Related issues:

• Arrow 0.3 release (blocks)

_{Note: This issue was originally created as ARROW-669. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
This is included in the patch for ARROW-668: #487

[asfimport]

Wes McKinney / @wesm:
Resolved by PR e29a7d4