Allow user certificates

[TheOneValen]

Should fix #5

[eikek]

Thank you so much! Have some questions, hope you don't mind…

1. tools:ignore="AcceptsUserCertificates" what does this mean?
2. Did you maybe try it out with a custom build? (I'd then simply create a release and otherwise I'd try it on my phone first, just ftr)

[TheOneValen]

Sure, no worries :)

1. It's to suppress a warning in my current Android Studio Version. It is a security issue to allow user certificates. A user can install a certificate which can be used to decrypt the traffic of said user. Installing a user certificate on android since (don't know which version) also leads to a nagging message in the drawer. So you should know what certificates you install when you want to do that. Apps can be configured (in fact are so by default as we have seen with Feature request: Allow user/custom certificate CA #5) to ignore user certificates.
2. I tried it on my emulator as I would otherwise have to remove the official app from my phone due to different signing.