[bug 948998] Fix bigram links with no start dates
[bug 948998] Fix bigram links with no start dates

This hard codes the start date for bigram links to the dashboard to
2013-01-01 which is a hack to force the dashboard to show all of the
responses with this bigram.

rlr/fjord,mozilla/fjord,staranjeet/fjord,staranjeet/fjord,DESHRAJ/fjord,Ritsyy/fjord,DESHRAJ/fjord,DESHRAJ/fjord,staranjeet/fjord,mozilla/fjord,mozilla/fjord,hoosteeno/fjord,hoosteeno/fjord,Ritsyy/fjord,hoosteeno/fjord,staranjeet/fjord,lgp171188/fjord,lgp171188/fjord,Ritsyy/fjord,mozilla/fjord,lgp171188/fjord,rlr/fjord,Ritsyy/fjord,lgp171188/fjord,rlr/fjord,hoosteeno/fjord,rlr/fjord