cleanup server statistics page; remove unused .js and .css files; fix the sortable table; add new columns
Merge pull request #723 from dmavroeidis/master

Added cesar meta-share nodes to the portal.
fix problem with usage statistics updating when there are no longer available resources after syncronization
Merge remote branch 'upstream/master'
Merge pull request #724 from cgirardi/master

Fix usage statistics information
fix error with X-Forwarded-For headers with multiple IP addresses

We have to make sure here that the `_get_ipaddress` function returns at
most one IP address.
Merge pull request #725 from cspurk/master

fix error with X-Forwarded-For headers with multiple IP addresses
host our own, stable version of the jQuery Expander Plugin

This makes us independent of other websites on the one hand. On the
other hand, this change fixes a problem with Google Chrome and other web
browsers when accessing a META-SHARE node via HTTPS: some web browsers
automatically block JavaScript code from “insecure” connections (HTTP)
when the main page is hosted via HTTPS. By hosting our own version of
the plugin, we will typically also serve it via HTTPS when we serve the
main page via HTTPS.
remove unused web font references

This change also fixes a problem with Google Chrome and other web
browsers when accessing a META-SHARE node via HTTPS: some web browsers
automatically block JavaScript/CSS code from “insecure” connections
(HTTP) when the main page is hosted via HTTPS.
Merge pull request #726 from cspurk/master

bug fix: make all JavaScripts work via HTTPS, too
added menu item for metashare-info
added named URL pattern for metashare-info.html
added menu item for metashare-info
make sure to never throw any `UnboundLocalError`s in the `finally` block
Merge pull request #728 from dmavroeidis/master

Better quality logos for CESAR nodes
Merge branch 'master' of https://github.com/ioannagian/META-SHARE into various-improvements
various smaller menu improvements
Merge pull request #729 from cspurk/various-improvements

various improvements – see individual commits
Merge github.com:metashare/META-SHARE