Log message:
Add buildlink3 file

Log message:
EET is a tiny library designed to write an arbitary set of chunks of data
to a file and optionally compress each chunk (very much like a zip file)
and allow fast random-access reading of the file later on.  It does not
do zip as a zip itself has more complexity than is needed, and it was
much simpler to impliment this once here.

It also can encode and decode data structures in memory, as well as
image data for saving to eet files or sending across the network to
other machines, or just writing to arbitary files on the system. All
data is encoded in a platform independant way and can be written and
read by any architecture.