Automatically snap external symlinks when releasing.
Automatically snap external symlinks when releasing.

Only one layer though.  Also detects when this would fail due to a circular link.

This is to support the pattern of symlinking content into the modules directory.
	Change on 2016/01/25 by nretallack <nretallack@google.com>
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=112989083

andela-angene/coursebuilder-core,andela-angene/coursebuilder-core,andela-angene/coursebuilder-core,andela-angene/coursebuilder-core