chronological sorting of activities.
refactoring string constants.
integrating social via an iframe.
Merge branch 'master' into social

Conflicts:
	modules/apps/store/asset.jag
fixing the merging issues.
adjusting user reviews box width
adding sso.
Merge branch 'master' into social

Conflicts:
	modules/apps/social/themes/default/css/styles.css
Merge branch 'master' into social
setting height for social iframe.
removing unnecessary log.
Merge branch 'social'
Merge branch 'master' of github.com:wso2/enterprise-store