Column indexes: read/write API

[asfimport]

Reporter: Gabor Szadovszky / @gszadovszky
Assignee: Gabor Szadovszky / @gszadovszky

Related issues:

• Column indexes: Show indexes in tools (is depended upon by)
• Column indexes: Limit index size (is depended upon by)
• Column indexes: Truncate min/max values (is depended upon by)

PRs and other links:

• GitHub Pull Request #456
• PR

_{Note: This issue was originally created as PARQUET-1211. Please see the migration documentation for further details.}