Make TableService constructor usePathStyleURI setting smart about credentials about azure-sdk-for-node

[markcowl]

Looking at the code path, if EMULATED=true, isEmulated returns true, even if your HOST setting doesn't match the devstorage hosts. Should use the credetnails instead to determine, and calculate the host URI and usePathStyleUri if they are not provided

[markcowl]

parse credentials to decide what the uri style and uri should be

[perrysk-msft]

In our latest release there are convenience methods in azure.js that make creating a client easier through the new auth scheme.

Also note:

• isEmulated is now removed (it was difficult to determine if the client was emulated if devstore credentials were directly passed).
• In addition to the environment variable EMULATED, there is a convenience method to create dev store credentials to pass in.
• The order in which credentials are assessed is consistent: If parameters are passed in, they and they alone are honored.
  o There is no mixing (For example, if you pass in host you won't get the access key from your environment variable).
  o If no parameters are passed in, the environment variables are used.
  Within both those strategies, the order of evaluation is emulator (in the case of EMULATED env var only), connection string, account/key or sas, anonymous.
  o If account/key and sas are passed in, an error is thrown indicating the credentials are invalid.

Please refer to the ChangeLog for a complete list of added features and fixes.
https://github.com/Azure/azure-storage-node/blob/master/ChangeLog.txt

Download the latest Node.js Module
https://www.npmjs.org/package/azure-storage

Get the source code
https://github.com/Azure/azure-storage-node

Read our blog post: Microsoft Azure Storage Client Module for Node.js v. 0.2.0 http://blogs.msdn.com/b/windowsazurestorage/archive/2014/06/26/microsoft-azure-storage-client-module-for-node-js-v-0-2-0.aspx