Basic tool-set for n3-*** projects
_data: sample files for unit test.
common: basic support for others.
preprocess: a wrapper for go-lang invoking external executable.
n3-csv: needed functions for csv processing.
n3-json: needed functions for json processing.
n3-xml: needed functions for xml processing.
jkv: support n3-privacy mask enforcement module & n3-sif2json