Updated Blog Post Series 4

Fixed typos and added section on Azure Search
Validating URL redirects

Relying on UrlHelper from System.Web.MVC to detect urls that are not
local to the current application.
Spelling
Wikipedia style highlighting of external links
Embedded external link background images as datauris
Blog Post 5.2 - Validating Redirects and Forwards
Updating blog
Rename Blog 5.2 - Validating Redirects and Forward to Blog 5.2 - Validating Redirects and Forward.md
Merge pull request #8 from dpaquette/ValidatingRedirectsAndForwards

Validating redirects and forwards - looks really good. I'm not sure if this will be post 5.2 or a later one if we try to keep the order from post 5.0. We can talk about it later.
Update BlogTopics.md
Talking a bit about hashing
Fixed minor typos in Blog 4.4 and 4.5
Merging changes from master
Merge branch 'SQL_Parameters'
Merge pull request #10 from dpaquette/blog5.1

Blog5.1
Fixed typos and renamed Validating Redirects to 5.3
Using RequireJS to load jQuery when it has not already been loaded
Merge pull request #11 from dpaquette/ValidatingRedirectsAndForwards

Using RequireJS to load jQuery when it has not already been loaded
Blog Post 5.3 Added section on RequireJS

Using RequireJS to ensure that jQuery is loaded
Adding section about why I'm stripping out custom fields