v0.9.0

CHANGES:

• Add support of 4.07 and 4.08 in Travis (@XVilka, @dinosaure, #70, #71)
• Use mmap (@XVilka, @dinosaure, @hannesm, #68, #69, #71)
• Update documentation (@yurug, @dinosaure, #65, #66)
• Micro-optimization about specialization (@dinosaure, #64)
• Re-organize internals of decompress (@dinosaure, #63)
• GZIP support (@clecat, review by @dinosaure, @cfcs, @hannesm, #60)

• fix #58 (@dinosaure)