index_entry: Added missing fields.

This adds dev, ino, mode, uid, gid, file_size, oid, flags, and flags_extended, which were previously omitted.

Fixes #94.
Regenerated include/index_entry.h and src/index_entry.cc after new fields were added.
Merge pull request #95 from papandreou/addMissingFieldsToIndexEntry

Add missing fields to index entry