Fixed bugs in chemkin.getSpeciesIdentifier().
Fixed bugs in chemkin.getSpeciesIdentifier().

* The algorithm was only allowing names up to nine characters in length,
  when up to ten are allowed.

* For the "last resort" name, the letters "SPC()" were taking up five of
  the allowed characters. This meant that any species with index greater
  than 9999 would not work. Instead I am now using "S()", which, when
  coupled with the fix above, allows species index up to 9999999.

nyee/RMG-Py,enochd/RMG-Py,nickvandewiele/RMG-Py,faribas/RMG-Py,pierrelb/RMG-Py,pierrelb/RMG-Py,chatelak/RMG-Py,KEHANG/RMG-Py,chatelak/RMG-Py,comocheng/RMG-Py,KEHANG/RMG-Py,nickvandewiele/RMG-Py,nyee/RMG-Py,faribas/RMG-Py,enochd/RMG-Py,comocheng/RMG-Py