Rollup by hash code appropriately
SqlException: add useful data to the custom log
Fixed "Wehther" typos
Wrong handler for exceptions.axd in Samples.MVC4

Fixes issue #29
Merge pull request #38 from mandlar/patch-1

Fixed "Wehther" typos
Merge pull request #39 from snoopydo/Issue-29

Wrong handler for exceptions.axd in Samples.MVC4
Fix Null ref on SQL-only and valid email subjects

This resolves issues raid in #40, with less allocations in most use
cases.