added search form in root page

Signed-off-by: erikathea <ethajes@gmail.com>
Merge branch 'master' of https://github.com/juliusm/WebgeekApp

Conflicts:
	grails-app/controllers/com/webgeekapp/AdvertisementController.groovy
	grails-app/views/layouts/_header.gsp

Signed-off-by: erikathea <ethajes@gmail.com>