CNAM-467: update readme

[dsun0720]

add orc config in readme

[codecov]

Codecov Report

Merging #63 into develop will increase coverage by 0.48%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop      #63      +/-   ##
===========================================
+ Coverage    94.69%   95.17%   +0.48%     
===========================================
  Files           37       37              
  Lines          565      580      +15     
  Branches        31       25       -6     
===========================================
+ Hits           535      552      +17     
+ Misses          30       28       -2     

Impacted Files	Coverage Δ
...hnique/cmap/cnam/flattening/FlatteningConfig.scala	100.00% <ø> (ø)
...e/cmap/cnam/flattening/FlatteningMainConvert.scala	90.00% <ø> (ø)
...p/cnam/flattening/join/SSRRIPFlatTableJoiner.scala	100.00% <ø> (ø)
...olytechnique/cmap/cnam/flattening/Flattening.scala	100.00% <100.00%> (ø)
...echnique/cmap/cnam/flattening/FlatteningMain.scala	95.65% <100.00%> (ø)
...ue/cmap/cnam/flattening/convert/CSVConverter.scala	100.00% <100.00%> (ø)
...nique/cmap/cnam/flattening/convert/Converter.scala	100.00% <100.00%> (ø)
...ue/cmap/cnam/flattening/join/FlatTableJoiner.scala	100.00% <100.00%> (ø)
...lytechnique/cmap/cnam/flattening/join/Joiner.scala	100.00% <100.00%> (ø)
...map/cnam/flattening/join/PMSIFlatTableJoiner.scala	100.00% <100.00%> (ø)
... and 4 more

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