Update version and changelog
Merge pull request #914 from andrerod/release-0.7.12

Update version and changelog
Adding null check for AddressSpace in VPNClientAddressPool node under Gateway
Merge pull request #915 from anumsopentech/release-0.7.12

Adding null check for AddressSpace in VPNClientAddressPool node under Ga...
throw error if wrong setup environment for apns and mpns certificates
Merge pull request #918 from andrerod/release-0.7.12

throw error if wrong setup environment for apns and mpns certificates
Improve errors
Merge pull request #921 from WindowsAzure/release-0.7.12

Release 0.7.12
Fixed certificate setup
922: send for GCM and Template send for Notification Hubs serialize JSON incorrectly.
Merge pull request #924 from christav/fix-service-cert

Fix service cert
Fix for xplat issue #809
response to review feedback
Merge pull request #925 from markcowl/release-0.7.12

Fix for xplat issue #809
Merge pull request #931 from WindowsAzure/release-0.7.12

Release 0.7.12
Merge pull request #930 from WindowsAzure/master

Merge back to dev
Merge pull request #923 from andrerod/dev

#922: send for GCM and Template send for Notification Hubs serialize JSO...