Update README.md with more explicit license

Author: JayFoxRox

Diff for: README.md

@@ -27,10 +27,29 @@ make -j 4
 
 The tools will be available in the build folder.
 
+# Donate
+
+If you like my work, a donation would be nice:
+
+* [Patreon](https://www.patreon.com/jayfoxrox)
+* [PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=x1f3o3x7x%40googlemail%2ecom&lc=GB&item_name=Jannik%20Vogel%20%28JayFoxRox%29&no_note=0&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHostedGuest)
+
+Even a small amount does help me and shows appreciation. Thank you!
+
 # License
 
-License is TBD.
-Consider it (c) 2017 Jannik Vogel (JayFoxRox) until then.
+(c) 2017 Jannik Vogel (JayFoxRox)
+All rights reserved.
+
+* I hereby explicitly allow you to look at the source-code of pba-tools.
+* You are also allowed to download my code, compile my code and execute the generated binary.
+* For scripts you are allowed to interpret them using the respective scripting languages interpreter.
+* You are *explicitly* **not allowed to modify** any of my code.
+* You are *explicitly* **not allowed to link** (in any possible way) my code (or any derivative, such as the binary) against other software (except system libraries) either.
+* You are *explicitly* **not allowed to redistribute** my code (or any derivative, such as the binary) anywhere.
+
+This means you are not allowed to re-use this code (or any derivative work) for any other projects.
+
 
-(I hereby explicitly allow you to look at it, use it but not re-use code for other projects)
+Want this changed? License is TBD.
 If you have license recommendations, tell me about it in GitHub Issue #1