added files for unit tests
moved files for unit tests into test/ for clearity
now all test cases succeed
added reference files which are compared with output csv/json in the unit test
doesn't remove spaces in statee names
renamed all functions from func_xxx_yyy to funcXxxYyy
modified file pathes in tester.py so that tests succeed independent of whether it is called outside test/ or inside test/
added how to run unit test to README