refactro column reader
simplify end of page count
Merge branch 'master' of github.com:Parquet/parquet-mr into refactor_column_reader
fix javadoc
adding dictionary encoding for long,double,int,float
refactoring dictionary encoding for non string types after comments #127
split out method to facilitate the inliner job
Merge pull request #127 from atkeano/dictionary_encodings

Adding dictionary encoding for non string types.. #99
Merge pull request #118 from Parquet/refactor_column_reader

Refactor column reader