Merge pull request #16 from Parquet/update_encodings

Update encodings
improve perftest
Merge pull request #17 from Parquet/thrift_to_pig_compat2

Slight change in ReadSupport API
Update README.md
Update README.md
avoid string decoding recoding
Merge pull request #19 from Parquet/improve_thrift_perf

avoid string decoding recoding
add better Bytes plain decoder
first stab at dict encoding
fix perf test
fix offset
fix perf problem with new String(bytes, offset, length, encoding)
remove one array copy
Merge pull request #20 from Parquet/perf_improvement

Perf improvement
dictionary encoding
fix dictionary encoding
dictionary encoding
relocating jackson inside the parquet-thrift jar
add scrooge and cascading support
add indirect jackson jar dep