Merge pull request #988 from dfberry/1.5.1

fixed null merchello context
SalesOverTime report revisions
Merge pull request #989 from rustyswayne/1.5.1

SalesOverTime report revisions
fix to sales report
Merge remote-tracking branch 'merchello/1.5.1' into 1.5.1
fixed sales report and added sdf of interesting data
Merge branch 'reports_1208' into 1.5.1