Update AUTHORS and core team list in readme.

AUTHORS

@@ -1,24 +1,24 @@
 David Winterbottom
 Maik Hoepfel
 Michael van Tellingen
+Alexander Gaevsky
+Samir Shah
 Sebastian Vetter
 Jon Price
 Markus Bertheau
 Andrew Ingram
-Alexander Gaevsky
+pyup-bot
 Asia Biega
 Xavier Ordoquy
 Oliver Randell
 Izidor Matušov
+John Parton
 Eleni Lixourioti
 Tomasz Rybarczyk
 Andy Sellick
-John Parton
 Kura
 Pavel Vavruska
 Patryk Zawadzki
 Jonathan Moss
 andysellick
 Paweł Kowalski
-Dawid Lorenz
-Janusz Harkot

README.rst

@@ -86,6 +86,8 @@ Core team:
 - `Maik Hoepfel`_ (Twitter `@maikhoepfel`_)
 - `Markus Bertheau`_
 - `Michael van Tellingen`_
+- `Alexander Gaevsky`_
+- `Samir Shah`_
 
 .. _`David Winterbottom`: https://github.com/codeinthehole
 .. _`@codeinthehole`: https://twitter.com/codeinthehole
@@ -93,6 +95,8 @@ Core team:
 .. _`@maikhoepfel`: https://twitter.com/maikhoepfel
 .. _`Markus Bertheau`: https://github.com/mbertheau
 .. _`Michael van Tellingen`: https://github.com/mvantellingen
+.. _`Alexander Gaevsky`: https://github.com/sasha0
+.. _`Samir Shah`: https://github.com/solarissmoke
 
 Screenshots
 -----------