Start to create record picker

I have started to design and create the record picker. Metadata records
should be picked either through search or through score. Two records are
displayed side by side. The code for this creation is inside a loop.
This way I might generalize it to display arbitrary metadata records,
although I have no idea how to solve this visually.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Refactor helper methods for metric report anchors

Just refactored the helper methods to be based on the same method used
to construct the URL.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Create helper method for record-by-score submenu

I have added a quite large helper method to construct the submenu if the
user wants to select a record by the metric score. There biggest problem
was to to keep the parameters general to multiple records.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Include initial records for the metric report

When no record was yet selected manually the default records should be
loaded and taken into account when generating the parameter and URLs.

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