[demo.py] allow several lines in build DLL section, added 'input' section as a requirement in JSON file, removed check for input related keys in general section
[demo.py] allow several lines in build DLL section, added 'input' section as a requirement in JSON file, removed check for input related keys in general section

mcolom/ipolDevel,mcolom/ipolDevel,mcolom/ipolDevel,mcolom/ipolDevel