I'd say the SNP winning 56 out of 59 Scottish seats at the recent general election is the first step towards showing that there is a mandate for a new referendum. A convincing showing by the SNP in next years Scottish elections will seal it for me. I still wouldn't expect a new referendum to take place until towards the end of the next Scottish parliamentary term though, these things take time to organise.
That's absolute rubbish, plenty of people that were no voters, voted SNP during the general election because they thought the other parties were not worth voting for, not because they wanted independence