Add timestamp and numerical results to index page

A timestamp will help make clear that the report is automatically
generated. The timestamp will also indicate that the report generation
is working. The numerical results will give a more concrete overview
than the pie charts.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Write portal name amendment function

Not every string can be used as an identifier for the Bootstrap tab
component. This is a problem limited to the front-end and should not be
dealt with when the data is generated. Thus, I have written a method to
deal with the identifier amendment.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>