feat(java/S3Uploads.java): Widen/fine-uploader#897 - include Java server-side example for direct-to-S3 uploads
feat(java/S3Uploads.java): Widen/fine-uploader#898 - modify server-side example to handle signatures for REST calls
feat(java/S3Uploads.java): use more generic terms when dealing with signatures
feat(java/S3Uploads.java): use more generic terms when dealing with signatures
feat(php/s3/s3demo.php): PHP example for the upload-to-s3 feature

Note: This is the same code to be used in the upload-to-S3 example that will appear
on fineuploader.com when 3.8 releases
docs(php/s3/s3demo.php): clarification
docs(php/s3/s3demo.php): AWS SDK for PHP installation manual link
docs(java/s3/S3Uploads.java): use consistent comments and structure for S3 examples
feat(php/s3/s3demo.php): pear no more
feat(php/s3/s3demo.php): verify policy & REST header strings before signing
feat(php/s3/s3demo.php): verify file size after file has been sent to S3
feat(php/s3/s3demo.php): more comments, less code duplication
feat(php/s3/s3demo.php): update comments after addition of more S3 calls
feat(nodejs/s3/s3handler.js): create node example for Fine Uploader S3
feat(python_django_s3): python + django example using s3
feat(requirements): add requirements
feat(main.js): Providing javascript code
removed client-side code to ease maintainability
Update README.md

Code formatting
chore(php/s3/s3demo.php): remove ACAO wildcard