upgrade bootstrap-scoped.css to version 3.1.1 (needed for container-fluid)

generated with:

curl -s http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.css | perl -lpe 'BEGIN { $prefix = ".bootstrap-smsu-api-admin" } if (($indent, $s, $sep) = /^(\s*)([^@\s].*?)(\s*[,{])$/) { $s =~ /^(from|to)*$/ or $s =~ s/(^| )(body|html)($|\W.*)/$1$prefix$3/i or $s = "$prefix $s"; $_ = "$indent$s$sep" }'  > src/main/webapp/css/bootstrap-scoped.css
cleanup js: replace isPortlet with allowLogout
js: add helper function getTemplateUrl
create welcome-inc.html (for re-use in next commits)
create breadcrumb-inc.html (for re-use in next commits)
css/html: instead of using tricks to put navbar at bottom, duplicate the welcome content and display the one needed
css/html: 800px is not enough to nicely display both navbar + content

(tested on ipad)
html: use bootstrap container-fluid instead of container (otherwise content is centered which looks bad in uportal)

NB: container-fluid requires bootstrap >= 3.1