Update readme: premium features/donations

README.md

@@ -110,6 +110,23 @@ make test-all
 - Use [issues](https://github.com/sosedoff/pgweb/issues) for any questions
 - Check [wiki](https://github.com/sosedoff/pgweb/wiki) for extra documentation
 
+## Premium Features
+
+If you or your company would like to sponsor a custom feature, please let me know
+via email (see contact section). Custom features are developed exclusively for the
+client and not committed to the public repo. 
+
+## Donations
+
+Pgweb is free and open source software, there's no plan to make a business out of it.
+If you wish to support the development, you can send a donation of any size using
+the following platforms:
+
+- Paypal: dan.sosedoff@gmail.com
+- Bitcoin: 1qAGohEhuNEkJEhHyEQfLgXAwY7dWRhmU
+
+Any contribution is much appreciated. 
+
 ## Contact
 
 - Dan Sosedoff
@@ -118,6 +135,6 @@ make test-all
 
 ## License
 
-The MIT License (MIT)
+The MIT License (MIT). See `LICENSE` file for more details.
 
-Copyright (c) 2014-2017 Dan Sosedoff, <dan.sosedoff@gmail.com>
+Copyright (c) 2014-2017 Dan Sosedoff, <dan.sosedoff@gmail.com>