Add static load method to Blob and Bucket, add tests, update example#257

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aozarov merged 5 commits intogoogleapis:masterfrom

mziccard:add-blob-bucket-load

Oct 16, 2015

Commits on Oct 14, 2015

Add static load method to Blob and Bucket, add tests, update example
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committed
Fix Blob/Bucket load javadoc, return null if not found
mziccard
committed

Commits on Oct 15, 2015

Commits on Oct 16, 2015

Update StorageExample, readme and package info examples
mziccard
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