[sc-memory] Store link contents with size < 32 bytes instead of checksum (issue #175)
[builder] Add check for empty link contents
[builder] Add backward compability for  old version of gwf format
[builder] Fix parse error handling
[sc-memory] Fix error with invalid state on memory restart (issue #81)
[sc-memory] Fix bug with empty content get
[builder] Fix lexer error handling
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