feature Note accepts ':' chars
So metadata of obsmarker consists of more then 1 ':' char,
The content of the variable 'data' in this function is:
'date:1518013344.878793 -3600\x00ef1:0\x00note:6c95ca::a1e17f\x00p1:ed7673f73387b36521da58a87f08e02e4a795ded\x00user:Denis Laxalde <xxx@yyy.zz>'
resulting in giving a error ValueError (too many values to unpack) because we are trying to store multiple values into two variables key and value
Resolving this error by splitting the variable 'l' from the first occurence of ':'
key, value = l.split("", 1)