- remove destination file before attempting move from temp directory
- added shouldOverwrite property
call progressiveDownloadProgress in main queue
Fix where files are not moved from temporary path to targetPath when completion blocks are not set.
Merge pull request #19 from SpacyRicochet/master

Fixes issue #18.
Merge pull request #16 from fengjian0106/patch-1

call progressiveDownloadProgress in main queue
Merge pull request #12 from xinsight/master

Avoid 'file exists' error if file has been previously downloaded
Fixes #22, Failure block not being called when cancelled
Merge pull request #23 from moored/master

Fixes #22
Update README.md
Added reference to AFDownloadRequestOperation in progressiveDownloadProgressBlock
Merge pull request #25 from nhisyam/master

Added reference to AFDownloadRequestOperation in progressiveDownloadProgressBlock
modify podspec to version 0.0.2
Merge pull request #26 from ZeR0-Wu/master

update podspec to new version
Customize progressive download callback queue
Avoid errors when resuming a fully downloaded file

If the offset of the Range header is equal to the content length (as is
the case for a fully downloaded file), a 416 Requested Range Not
Satisfiable status code will be returned. We need to add this status
code to the index set of acceptable status codes.
Merge pull request #29 from fumoboy007/master

Avoid errors when resuming a fully downloaded file
Merge commit 'e11524c4045a1b40bb657fdabd9a767855c20ce5'

Conflicts:
	AFDownloadRequestOperation.m
Merge pull request #30 from chebur/master

Progressive download callback queue customization
Don't write to output stream if any error occurs.