some documentation updates

Ignore-this: 9ad26fc7e2cc4f223e6dbf58d9113a6c

darcs-hash:20140927024201-c21fe-446c9677c62f85bbeb79af8647e7e885dea04e31
added snappy to windows build

Ignore-this: c68feefbb0c1850188ebaf7f64dc53f7

darcs-hash:20140730164936-c21fe-bbfbd1e378bbcaeb91950f622d787a20304c2c3e
fixed bug in windows build in uncompress function

Ignore-this: d85a026432a11d9416328515a8ee5d1

darcs-hash:20140730164952-c21fe-0a2257dc1b9f0d61defbb7a80b558c30ce4169cb
fixed windows build

Ignore-this: 47f383b7659392f2a46a666152020ff9

darcs-hash:20140903141824-c21fe-a2b04019b66cb2a3ae95bd75578b2c45e07428c2
windows build changes

Ignore-this: 546b402be3ef20507e889c06dfae7d15

darcs-hash:20140923145538-c21fe-0f26c3049759b1f6036aab56a4257652ca589b46
fixed crash in windows

Ignore-this: 33d76ca4a82558828b2eaba00c366e09

darcs-hash:20140923154507-c21fe-d058ee778cb7d6d954f6930e64017b81b9fec710