updated contributions list in header to include Martin Muenstermann
updated contributions list in header to include Martin Muenstermann

ninemoreminutes/pycurl,m13253/pycurl-python3,jcharum/pycurl,ninemoreminutes/pycurl,m13253/pycurl-python3,jcharum/pycurl,ninemoreminutes/pycurl,m13253/pycurl-python3,ninemoreminutes/pycurl,jcharum/pycurl