Update f-droid page

Can't edit it, can't create an account: https://f-droid.org/wiki/page/se.leap.bitmaskclient contains some info that needs to be updated.

Issue tracker url to 0xacab
Donate link https://leap.se/en/about-us/donate
Bitcoin address: 1Fze6GLjoxFnwAGNreYLK8ktFdGJdPRxeY
source code, maybe better use the 0xacab url? I noticed in the official fdroid repo the 0.9.8RC1 and not the RC2 available?

Fee free to reassign/unassign.

Edited Feb 22, 2018 by kwadronaut

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