[Python] Support binary, utf8, and nested types in Array.from_buffers

[asfimport]

See discussion in ARROW-2607

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

Related issues:

• [Java/Python] Support VarCharVector / StringArray in pyarrow.Array.from_jvm (is depended upon by)

PRs and other links:

• GitHub Pull Request apache/arrow#4537

_{Note: This issue was originally created as ARROW-5531. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 4537
#4537