Code contributions graph

[keunes]

Short description: A simple graph showing code contributions over time (number of commits per week, over the past 6 months). There should be a call 'Join development' or 'Contribute to AntennaPod' in close proximity.

Location: Homepage, bit further down.

Why have this: Showcase that the project is under active development, and encourage people to contribute, too.

More info:

• Could look similar to the contributor graph on GitHub:
  
• Another layer could be added, indicating the number of contributors during that period (the number of accounts/people that submitted those commits). Though that might make it a bit too complex.
• It would be more interesting (than number of contributors) to have another layer in the graph for the number of strings that were translated (where each language counts as one), to consider & display also forms of contributions other than code.