Improve walking speed in Fidelity.
Removing commented out code.
Merge pull request #1006 from Microsoft/walkingSpeed

Improve walking speed in Fidelity.
Move away from separate syntax kinds for binary and unary expressions.
Removing unused code.
Merge pull request #1008 from Microsoft/lessSyntaxKinds

Move away from separate syntax kinds for binary and unary expressions.
Merge branch 'master' into removeUnnecessaryCode
Merge pull request #1010 from Microsoft/removeUnnecessaryCode

Removing unused code.
Improved type relation caching to fix #1002
Accepting new baselines
Addressing feedback and adding regression tests
Merge pull request #1017 from Microsoft/fixTypeRelationCaching

Fix type relation caching
Merge remote-tracking branch 'ts_official/master'
Update fidelity tests