Merge pull request #2263 from WindowsAzure/master

From Public Repo.
Adding Azure Active Directory identity provider for Mobile Services. Submitted 1/20/2014 6:43 PM
Merge pull request #2280 from wesmc7777/wesmcwork

Adding Azure Active Directory identity provider for Mobile Services. Sub...
Merge pull request #2286 from WindowsAzure/AUX3151

Aux3151
fixed incorrectly formatted link
Merge pull request #2291 from tysonn/fixinglinksjan21

fixed incorrectly formatted link
making media lowercase in image references
Merge pull request #2292 from mollybostic/aux3152_0121

making media lowercase in image references
link bugs
Merge pull request #2295 from cjgronlund/AUX3152-bugs

link bugs
adding titel
Merge pull request #2296 from mollybostic/aux3152_0121

adding titel
add missing images and others
Merge pull request #2298 from mumian/jgao-AUX3152-0123

add missing images and others
Merge pull request #2299 from WindowsAzure/AUX3151

Aux3151
Content for P&P architecture changes.
Merge pull request #2302 from WalterHub/myaux3152

Content for P&P architecture changes.
modify article metadata properties
Merge pull request #2303 from mumian/jgao-AUX3152-0123-v2

modify article metadata properties
Minor updates for the new Active Directory identity provider. Submitted 1/23/2014 3:50PM