Adding support for Azure source with connection string or using Azure
presign. Now its possible to do something like this:

SEGYImport.exe
        --azure-presign-base <BLOBSASURL>,
        --azure-presign-suffix <SASTOKEN>
        --azure-presign-source-base <SOMEOTHERBLOBSASURL>
        --azure-presign-source-suffix <SOMEOTHERSASTOKEN>
        NAME_OF_THE_SEG-Y_FILE
This will then read the SEG-Y file from the azure-presign-source-base
location and write the VDS to the azure-presign-base location