Add support for lz4

[ci-macpaw]

Originally reported on Google Code with ID 699

pejakm:

lz4
Extremely Fast Compression algorithm

https://code.google.com/p/lz4/
http://fastcompression.blogspot.com/2011/05/lz4-explained.html

lz4 is under the BSD 3-Clause License.

[ci-macpaw]

Dag Ågren (DagAgren):

Issue #947 was marked as a duplicate of this issue.

[ci-macpaw]

pejakm:

s/wine/whine/

[ci-macpaw]

pejakm:

Well, yes, you have the point. However, lz4 is getting into the kernel (http://www.phoronix.com/scan.php?page=news_item&px=MTQwODY),
so this might be the reason for its wider usage.

I'm just suggesting, didn't have the intention to wine about adding new feature (I
know how it can be annoying). :)

[ci-macpaw]

paracelsus:

Is it actually in use anywhere? There are far more compression formats than I could
ever implement, so I try to limit it to ones that actually see some use.