fix #30
adding document linking feature
Merge remote-tracking branch 'origin/dev' into dev

Conflicts:
	docdoku-server/docdoku-server-web/src/main/webapp/js/localization/nls/document-management-strings.js
	docdoku-server/docdoku-server-web/src/main/webapp/js/localization/nls/fr/document-management-strings.js
Merge remote-tracking branch 'origin/dev' into dev
add perma link to linked documents