AzureCopy (Go version)

This is a reimplementation of the AzureCopy project (github.com/kpfaulkner/azurecopy) in the GO language.
It is primarily to allow cross platform (Linux,*BSD, MacOS and Windows) versions of it.


- Copy to/from Filesystem (done)
- Copy to/from Azure Blob Storage (done)
- Copy to/from S3 (done)
- Copy to/from Dropbox (done)
- Add CopyBlob flag for Azure destination (huge bandwidth savings)
- Copy to/from Onedrive
- Copy to/from Google Storage
- Copy to/from Azure File Storage