[1D/Python] Add solver warnings for diffusion flame solutions
[1D/Python] Add solver warnings for diffusion flame solutions

Adds warnings that check if the solution of a counterflow diffusion flame is
reasonable (not extinct, and not too close to the boundaries of the domain).

Patch provided by Thomas Fiala.

Resolves Issue 231.

git-svn-id: e76dbe14710aecee1ad27675521492cea2578c83@3134 02a645c2-efd0-11dd-984d-ab748d24aa7e

Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn