* lays out SegmentStore functions to implement
* Merge branch 'master' into segment-store
* adds overlay calls to put
* allows SegmentStore Put to upload a file to ecclient, then save pointer to pointerdb
* Merge branch 'master' into segment-store
* removes new overlay client instance in Put
* fixes syntax
* fixes syntax again
* fixes imports
* fixes typo
* removes pointerdb client from segmentStore struct for now
* changes SegmentStore to segmentStore
* changing types in parameters to fit other function calls
* takes RedundancyStrategy out of Put params
* changes NewClient param back to take an interface (not pointer to interface)
* fixes types
* moves pointer into PutRequest in SegmentStore Put
* passes interfact, not pointer to interface to NewSegmentStore
* fixes some types
* Get returns an instance of Meta
* fixes PutRequest fields
* adds remotePieces slice to pointerdb PutRequest
* ecClient Put now takes *proto.Nodes instead of proto.Nodes
* fixes syntax
* changes ec client dial interface to use *proto.Node
* changes other instances of proto.Node to *proto.Node in ecclient pkg
* adds *proto.Node to Get and Delete functions in ecclient pkg
* changes proto.Node to pointer in ec client_test
* changes proto.Node to pointer in ec client_test
* adds ecclient and pointerdb client to the segmentstore constructor
* adds ecclient and pointerDBClient to segmentStore constructor
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