A JFFS2 filesystem extraction tool written in python.

Features:
- Big/Little Endian support
- JFFS2_COMPR_ZLIB, JFFS2_COMPR_RTIME, and
JFFS2_COMPR_LZMA compression support
- CRC checks - for now only enforced on hdr_crc
- Extraction of symlinks, directories, files, and device nodes
- Detection/handling of duplicate inode numbers. Occurs if multiple
JFFS2 filesystems are found in one file and causes jefferson
to treat segments as separate filesystems