small updates to README with feature matrix and other improvements
fix readme links
support for schema compatibility
Should not write data if the RL/DL is all zeroes
add a bit more pig detail
Merge pull request #73 from aniket486/write_no_data_for_no_RL_DL

Should not write data if the RL/DL is all zeroes
fix dictionary decoding bug when more than one encoding is used
Merge pull request #71 from Parquet/update_readme

Update Readme
add negative tests
Merge pull request #72 from Parquet/schema_compatibility

support for schema compatibility
fix schema compat
Merge branch 'master' into schema_compatibility
Merge pull request #75 from Parquet/schema_compatibility

Schema compatibility fix
fix call to converter
Merge pull request #74 from Parquet/fix_dictionary_decoding

fix dictionary decoding bug when more than one encoding is used
split Plain reader so that the reader knows what type it's reading
collapse small classes into one class
refactored bit packing
Merge pull request #79 from Parquet/split_plain_reader

split Plain reader so that the reader knows what type it's reading
fix for schema compatibility