PARQUET-240: Fix typo in the LIST description
PARQUET-240: Fix typo in the LIST description

The description mistakenly refers to the repeated element being named "array"
instead of "list". This also fixes one grammatical error.

Author: Colin Marc <colinmarc@gmail.com>

Closes #25 from colinmarc/fix-list-typo and squashes the following commits:

5c36271 [Colin Marc] Fix typo in the LIST description

apache/parquet-format,liancheng/parquet-format,winningsix/parquet-format,rdblue/parquet-format,liancheng/parquet-format,winningsix/parquet-format,kostya-sh/parquet-format,liancheng/parquet-format,apache/parquet-format,kostya-sh/parquet-format,rdblue/parquet-format,rdblue/parquet-format,winningsix/parquet-format,kostya-sh/parquet-format,apache/parquet-format