fix core-dump while reading PLAIN_ENCODING;
fix readNewPage to return page instead of the last one
Fix off by one in delta bit pack encoding.
Updated readme.
Add a plain encoded test file and some misc documentation.
Move encoding to own folder.
Abstraction for compression.
Implement snappy decompression.
Add thrift generated sources.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/parquet.cc