Added cantherm.input module for reading of job files.
Added cantherm.input module for reading of job files.

CanTherm input files are designed to follow Python syntax, so we can take
advantage of Python's exec command to load them. The input module associates
a number of "functions" in the input file with the real functions used to
process the input.

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