Create Visualization

[achiminator]

It would be great if the metrics have a valid visualization engine. The requirements are

• flexible regarding the input data (so that we can rather easily add and remove metrics
• enable the analysis of historical metric data
• The user should be able to choose the metrics he/she want to visualize
• This preferences get stored into a database for further analysis
• The user should then choose the visualization that makes the most sense to him
• it is possible to download the visualization (e.g., as a jpg)
• To reduce complexity, the visualization should be made primarily for Python. I'd like to prevent the creation of a large JavaScript project inside of the rather plain python application. The student group worked with Bokeh, however, I'm not sure how much we can reuse of that code

[achiminator]

Most of that is implemented (thanks to @RandaAlbideh ).