Adds block storage extend's action support (#67)

* created Godeps dependency tree

* added vendor folder to gitignore

* added support for extend size action to volumes's client

* Revert "created Godeps dependency tree"

This reverts commit b9366e292c2e99e262240b98151c98f49c69df32.

* Revert "added vendor folder to gitignore"

This reverts commit 34403f85dad4f0514d7e0d8ce882b1712b82cd87.

* set volumeactions.ExtendSizeOpts.NewSize as required
5 files changed