Fixed Yaffs2 bugs:
offset changed from size_t to TSK_OFF_T
fixed error in spare area initialization that causes only one block to be tested
yaffsfs_load_attrs now handles special directories correctly

Initialized hash results to null (in case an error occurs before they are set)
Fixed spacing
Cleanup
Added md5 and image size to image_info SQLite table
Added checks to auto_db to only include ewf if it was built with it
Merge pull request #237 from APriestman/master

Fixed more Yaffs2 bugs
removd filler entry for 0-sized YAFFS2 files
Merge remote-tracking branch 'upstream/master' into new_tags_api