PEP8 fixes

now:
```
module_dhl.py:23:80: E501 line too long (97 > 79 characters)
module_dhl.py:51:80: E501 line too long (88 > 79 characters)
```

was:
```
module_dhl.py:10:1: E302 expected 2 blank lines, found 1
module_dhl.py:13:80: E501 line too long (84 > 79 characters)
module_dhl.py:17:41: E231 missing whitespace after ':'
module_dhl.py:21:80: E501 line too long (97 > 79 characters)
module_dhl.py:25:14: E111 indentation is not a multiple of four
module_dhl.py:27:14: E111 indentation is not a multiple of four
module_dhl.py:33:1: W293 blank line contains whitespace
module_dhl.py:48:80: E501 line too long (88 > 79 characters)
```

lines over 79 chars seem to be quite usual in pyfibot files