Major release with numerous API changes.

Bucket Operations.

• MakeBucket(bucketName, BucketACL, location) error
• BucketExists(bucketName) error
• RemoveBucket(bucketName) error
• GetBucketACL(bucketName) (BucketACL, error)
• SetBucketACL(bucketName, BucketACL) error)
• ListBuckets() []BucketInfo
• ListObjects(bucketName, objectPrefix, recursive, chan<- struct{}) <-chan ObjectInfo
• ListIncompleteUploads(bucketName, prefix, recursive, chan<- struct{}) <-chan ObjectMultipartInfo

Object Operations.

• PutObject(bucketName, objectName, io.Reader, contentType) error
• GetObject(bucketName, objectName) (*Object, error)
• StatObject(bucketName, objectName) (ObjectInfo, error)
• RemoveObject(bucketName, objectName) error
• RemoveIncompleteUpload(bucketName, objectName) <-chan error

File Object Operations.

• FPutObject(bucketName, objectName, filePath, contentType) (size, error)
• FGetObject(bucketName, objectName, filePath) error

Presigned Operations.

• PresignedGetObject(bucketName, objectName, time.Duration, url.Values) (string, error)
• PresignedPutObject(bucketName, objectName, time.Duration) (string, error)
• PresignedPostPolicy(NewPostPolicy()) (map[string]string, error)