Minor fix

Spell and comment issue.

Author: WangTao <barneystinson@aliyun.com>

Closes #10 from WangTaoTheTonic/minorFix and squashes the following commits:

0727a8f [WangTao] Minor fix
PARQUET-6: Create documentation on how to contribute.

Author: Julien Le Dem <julien@twitter.com>

Closes #8 from julienledem/master and squashes the following commits:

aa0d751 [Julien Le Dem] correct mailling-list
285b39c [Julien Le Dem] Update CONTRIBUTING.md
bca9bc4 [Julien Le Dem] Create CONTRIBUTING.md
PARQUET-9: Filtering records across multiple blocks

Update of the minimal fix discussed in https://github.com/apache/incubator-parquet-mr/pull/1, with the recursive call changed to to a loop.

Author: Tom White <tom@cloudera.com>
Author: Steven Willis <swillis@compete.com>

Closes #9 from tomwhite/filtering-records-across-multiple-blocks and squashes the following commits:

afb08a4 [Tom White] Minimal fix
9e723ee [Steven Willis] Test for filtering records across multiple blocks
Add tests for resetter and evaluator
Add tests for value inspector
Merge branch 'master' into alexlevenson/filter-api

Conflicts:
	parquet-hadoop/src/main/java/parquet/hadoop/InternalParquetRecordReader.java
Handle merge issues
move to right package
Add integration test for value level filters