Add tools.py from scopatz/xdress
Add cyclus_tools.py with a function to call cyclus
Correct zip() error in run_cyclus function
Add script to create reference output databases
Add a check if the target output directories exist
Renamed the file with input and reference output file names
Correct import statement after renaming test_lists.py to testcases
Correct a bug in creating directories as needed for output.
Merge branch 'cyclus_tools' into regression_test
Stylistic errors are corrected
Merge pull request #170 from rakhimov/regression_test

Introduction of a capability to create reference databases