Added rudimentary report route.
Extracted rendering with default layout to base controller class.
Extracted making of the database connection to base class.
Added code to prepare data for rendering Highcharts chart.

TODO: implement real drawing of histogram from given data.
TODO: implement real fetching of data from DB.
Added code to really render the histogram (data is still fake, correctly formatted though).
Fixed incorrect transformation of properties when filling query.
Fixed the horrible error handling in the app.
Removed unnecessary header in histogram page.
Moved accounting.js and moment.js to global assets.
Now histogram shows real data from database.
Added global menu to layout.
Added some wrapper elements for histogram to have same width as other UI.