use storage module instead of storage legacy and fix test code
Add tests for HTTP 408 retry logic
Add comment for HTTP 408
Bumping rollup package version
Fix error messages for reties on 404
Fixed missing dependency in azure-storage-legacy module.

Also bumped version # for storage-legacy package as part of this.
Update README.md

1.Including fine-grained npm module for storage (npm install azure-storage)
2.Deleting Storage Usage section (Blobs, Tables, Queues examples) 
3.Adding link to https://github.com/Azure/azure-storage-node/blob/master/README.md
Merge pull request #1318 from christav/use-new-storage

Use new storage module in azure module.
Merge pull request #1320 from perrysk-msft/patch-1

Update README.md
Merge pull request #1317 from ljhljh235/408

Add tests for HTTP 408 retry logic