fixed static files for dashboard

diff --git a/portal/static/dashboard.css b/portal/static/css/dashboard.css
similarity index 100%
rename from portal/static/dashboard.css
rename to portal/static/css/dashboard.css

diff --git a/portal/static/experiments.png b/portal/static/img/experiments.png
similarity index 100%
rename from portal/static/experiments.png
rename to portal/static/img/experiments.png

diff --git a/portal/static/testbeds.png b/portal/static/img/testbeds.png
similarity index 100%
rename from portal/static/testbeds.png
rename to portal/static/img/testbeds.png

diff --git a/portal/static/user.png b/portal/static/img/user.png
similarity index 100%
rename from portal/static/user.png
rename to portal/static/img/user.png