Update README.md

Corrected backlink to packagist.
Renamed chunk_manager to chunks

To match the DI configuration
Merge pull request #34 from dirkluijk/patch-1

Renamed chunk_manager to chunks
Removed an incorrect downgrade of max_size.

This fixes the following situation:
You are using chunked uploads. The total size of the file is 12MB, whereas `min(upload_max_size, post_max_size)` is limited to 8MB. The

The downgrading is still implemented. If you wish to gracefully downgrade max_size, set the configuration value to -1.
This addresses #35.
Added warning to readme.

ping #21
Do not rename chunks if the upload process is not yet finished.

Otherwise you will end up having a completly broken order of reassembling.
Addresses: #21
Merge branch 'master' of github.com:1up-lab/OneupUploaderBundle
Readded the codeblock for the assembling of chunks if load distribution is false.
Added new parameters to ChunkManagerInterface.
Removed warning in Readme.
Fixed a bug where chunked uploads where validated twice.

Fixes #36.
Added the size to the temporary created UploadedFile, so clientSize won't be null.

Details in #36.
Makes the buffer size for syncing files to gaufrette storages customizable.

This fixes #37.
Merge branch 'master' of github.com:1up-lab/OneupUploaderBundle
Added warning to upgrade section of readme.

Ping #21
Update custom_error_handler.md
Merge pull request #39 from maurotdo/patch-1

Update custom_error_handler.md
CS fixes.