Add migration#147

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derekchiang wants to merge 17 commits intorescrv:masterfrom

derekchiang:add-migration

Commits on Jan 23, 2014

Commits on Jan 24, 2014

Get rid of useless log messages
derekchiang
committed

Commits on Mar 13, 2014

This is a huge commit. Sorry. Anyway, it adds the feature that allows for migrating objects in one spaces to another space. And the process is fault-tolerant. It's not ready to be merged yet, s…
derekchiang
committed

Commits on Mar 20, 2014

Add a mechanism to inform the coordinator about the completion of migrations
derekchiang
committed

Commits on Mar 21, 2014

Commits on Mar 25, 2014

Add a test case for migration
derekchiang
committed

Commits on Mar 26, 2014

Commits on Mar 27, 2014

Bug fix
derekchiang
committed