Old donation address in wiki

[emanuelb]

This commit from 2015 update the bitcoin donation address to: 1BitherUnNvB2NsfxMnbS35kS3DTPr7PW5 from 1BsTwoMaX3aYx9Nc8GdgHZzzAGmG669bC3
1a80b72

The new address is in repo & app in:

https://github.com/bither/bither-android/blob/1a80b72f0ed614ae26109d96fa1ab034fd2883e9/README.md#donation

bither-android/bither-android/res/values/strings.xml

Line 612 in a35f73d

<string name="donate_address">1BitherUnNvB2NsfxMnbS35kS3DTPr7PW5</string>

while in wiki the old address is used in:

1. Content of QR-Codes-content-format page:
   https://github.com/bither/bither-android/wiki/QR-Codes-content-format

In this way, our donation address: 1BsTwoMaX3aYx9Nc8GdgHZzzAGmG669bC3

2. every footer of wiki page like:
   https://github.com/bither/bither-android/wiki

Donate : 1BsTwoMaX3aYx9Nc8GdgHZzzAGmG669bC3
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