fix bit packing encoding bug
Merge branch 'master' of github.com:Parquet/parquet-mr into fix_bit_packing_encoding_bug

Conflicts:
	parquet-column/src/main/java/parquet/column/values/dictionary/DictionaryValuesWriter.java
Merge pull request #60 from Parquet/fix_bit_packing_encoding_bug

fix bit packing encoding bug