Pcatellie

This commit is the PCA-TELLIE monitoring section for Minard. It requires a soft-link 'generated' inside the static/ directory which should point to the directory that contains the images that are generated by the PCA monitoring code.
Maybe a jinja macro to decide the class? http://stackoverflow.com/questions/12681036/is-there-a-direct-approach-to-format-numbers-in-jinja2.