Expand emissions variable values to 32 characters

[jlbeidler]

The increase in species with new chemical mechanisms has necessitated an expansion in the number of emissions variables. To track these variables in an easy-to-read way the variable names in CMAQ are being expanded to 32 characters. SMOKE should expand the variable length from 16 to 32 characters to align with this change.

[hnqtran]

Will look into SMOKE documentation and SMOKE codes to see how length of variable is controlled.

Potential areas to look at: species definition file, IOVLEN3, INCLUDE files