viz: fix analyze.py variable names, Cantera deprecation warnings, curly quotes in README

Author: sbryngelson

examples/nD_perfect_reactor/README.md

@@ -3,7 +3,7 @@
 Reference:
 > G. B. Skinner and G. H. Ringrose, “Ignition Delays of a Hydrogen—Oxygen—Argon Mixture at Relatively Low Temperatures”, J. Chem. Phys., vol. 42, no. 6, pp. 2190–2192, Mar. 1965. Accessed: Oct. 13, 2024.
 
-<img src=”result.png” height=”MAX_HEIGHT”/>
+<img src="result.png" height="MAX_HEIGHT"/>
 
 ## Validation