Add 'albuild.config'
Rearrange specs in 'sns' module
Fix edoc errors
Merge pull request #6 from Dfedyaschin/feature_albuild_take_2

Make `edoc` and `albuild` happy
Make sure that S3 response headers are in lower-case

`lhttpc` returns headers in next format:
 ```
  [{"Server","AmazonS3"},
   {"Content-Length","2992"},
   {"Content-Type","application/octet_stream"},
   {"Accept-Ranges","bytes"},
   {"Etag","\"c386da6322d41f850207036464f5acd4\""},
   {"Last-Modified","Fri, 12 Sep 2014 15:46:21 GMT"},
   {"X-Amz-Meta-Digest","H0oaB4sLi171BKPoqNhRrj2O0nYWee6z/M1nqOiG8Uw="},
   {"Date","Wed, 17 Sep 2014 11:39:11 GMT"},
   {"X-Amz-Request-Id","149F04FAD73793C4"},
   {"X-Amz-Id-2","rPMAaoPQKR8CV6Dd8CYjpUA6p6lVSJ+ykKAvjDnjhVURRwcCrlRwseNXg/dEOaDW"}]
 ```
 And later in code, we try to extract it from this proplist with lower-case keys, and we end either without our mete-data or with default values for other keys.
Merge pull request #7 from Dfedyaschin/feature_lower_headers

Make sure that S3 response headers are in lower-case
Fixed to properly extract elb lusteners info