Merge develop into master. about matomo-sdk-android

[dotsbb]

@d4rken It's nice to hear from you. I'm very grateful for your feedback!

For sure, it's good time to merge dev into master.
I would rather bump dev vesrion to 0.1.0. Current master should be 0.0.2 because it's already ahead https://github.com/piwik/piwik-sdk-android/tree/v0.0.1 by ~50 commits.

Before we merge it I think it would be nice to have following list done:

• Fix&close #31
• Introduce Change Log
• Update wiki

I'll try to find some spare time to do it on weekends.

[d4rken]

👍 sounds good.

We could attach the changelog to releases.
i.e.
Read commits between current tag and previous tag, create release for current tag, write changelog into its description.