* starts adding segmentStore tests
* adds mocked interfaces for segmentStore tests
* adds tests for put, get, delete, and list
* regenerates pointerdb mock and updates calls to accommodate new changes
* begins adding inline segment support for segmentstore
* adds PeekThresholdReader struct plus Read and isInline methods
* moves PeekThresholdReader to peek.go, adds more simplified Read function
* adds PeekThresholdReader tests
* reverts Read function to earlier version, updates tests to use ReadFull instead
* Get function now handles inline type pointers
* adds correct type Size and ExpirationDate to inline segment
* fixes return value in Put func error condition
* moves thresholdBuf and Read tests into a table test
* adds border case test, fixes redundant parts
* passes sizedReader size to makeRemotePointer
