Remove the "" from attributes while parsing the graph def itself.
eg: "\"dtype\"" -> "dtype"
So we can directly refer to the attributes without adding double quotes to them.

* CrypTFlow2 code

* Some small corrections.

* Updated License to 2020

* Updated repo README to include SCI (CrypTFlow2) and moved CrypTFlow2/ to SCI/

Co-authored-by: Nishant Kumar <nishant.kr10@gmail.com>

* With new compiler changes

* After backend interface cleanup

* Interface cleaned up

* Removed funcSSCons and FLOAT_PRECISION fix

* funcSSCons right fix1

* Cleanup of several things ; Athos and EzPC changes for 2PC

* Residual changes

* More changes

* One left file