Remove unnecessary calls to parseCompString

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2877 02a645c2-efd0-11dd-984d-ab748d24aa7e
[ck2cti] Make 'PCHEB' and 'TCHEB' keywords case insensitive

Fixes Issue 213.

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2878 02a645c2-efd0-11dd-984d-ab748d24aa7e