Modifications to UI layout and plot details:
* dataset name and description now in a band coloured differently from header. added new style pagebar-col2 to capture this style.
* header graphic replaced to combine the name and version.
* intro panel is now a dismissable alert.
* plot y-axis now has dataset specific label. config file has the new key "ylabel" which is mandatory.
* Copyright information modified to include reference to CAMH.