[C++] Support timezone metadata in file/stream formats

[asfimport]

This will account for ARROW-637 on the C++ side

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

Related issues:

• Add integration tests for date and time types (blocks)

_{Note: This issue was originally created as ARROW-654. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
PR: #416

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 416
#416