Corrected comment dates,

because, as I'm writing this, 2014-08-26 22:30 UTC hasn't happened yet.
I'm basing the reader comment date and time on the premise that the time
is overall correct, but the date is off-by-one. This seems to fit the time
the pull request arrived.

Also, it looks as though I can't get my own comment dates right, either :$
Update 2012-09-28-DependencyInjectionandLifetimeManagementwithASP.NETWebAPI.html

adding new question, and putting code formatting on previous comment
Corrected some markup that screwed up the page.

Also reverted change to previous comment, on the policy that comments are
generally 'owned' by the person who submitted them.