FIX: added fixes to argument syntax, readme correction

[Frisle]

1. ByRef is not accepted by python through the arguments

2. There is a problem calling script like this irispython /path/to/file.py
   Calling it irispython path/to/file.py works well

(in the report i suggest to go to the destination first. but you can call the script just without forward slash)

[evshvarov]

@Frisle the python ByRef is reasonable, thank you! But the ObjectScript is fine.

[evshvarov]

fixed with different commit, thank you @Frisle