Merge pull request #18 from rushmin/master

Implementing XACML policy attaching part of APPM-56
Fix for APPM-55
Merge branch 'master' of https://github.com/wso2/app-manager
adding rejection flow transition in webapplifecycle.xml
Adding authentication service initialization in acs.jag
fix for redirect to IS login page when click on an asset if user is not logged-in