Merge pull request #1785 from WindowsAzure/master

From Master
Merge pull request #1801 from WindowsAzure/master

From Public Repo
Merge pull request #1803 from WindowsAzure/master

From AUX3131
Merge pull request #1804 from WindowsAzure/master

From AUX3131
modify the install and configure HDI PowerShell article
Merge pull request #1805 from mumian/jgao-AUX3132-1122

modify the install and configure HDI PowerShell article
Removed hard limits from storage how tos
one more change to remove hard limits for storage accounts
update the install and configure HDInsight PowerShell article
Merge pull request #1808 from mumian/jgao-AUX3132-1125

update the install and configure HDInsight PowerShell article
Merge pull request #1807 from tamram/112313

Removed hard limits from storage how tos
Merge pull request #1812 from WindowsAzure/AUX3132

Aux3132
Merge pull request #1813 from WindowsAzure/localMaster

From Public Repo
Merge pull request #1814 from WindowsAzure/AUX3132

Aux3132
Merge pull request #1815 from WindowsAzure/master

From Master
some updates to the HDInsight articles
Merge pull request #1816 from mumian/jgao-AUX314-1202v2

some updates to the HDInsight articles
Updates to Premium DB sign up docs and images
Adding new images for creating Premium DB
Merge pull request #1818 from karthikaraman/aux_kr_122_working

Aux kr 122 working