Added About the App fragment, used libraries info, their licences and authors mentions

app/src/main/res/drawable/ic_about.xml

@@ -1,9 +1,28 @@
+<!--
+  ~ Look4Sat. Amateur radio & weather satellites passes calculator for Android.
+  ~ Copyright (C) 2019, 2020 Arty Bishop (bishop.arty@gmail.com)
+  ~
+  ~ This program is free software; you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation; either version 2 of the License, or
+  ~ (at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License along
+  ~ with this program; if not, write to the Free Software Foundation, Inc.,
+  ~ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+  -->
+
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="32dp"
-    android:height="32dp"
+    android:width="24dp"
+    android:height="24dp"
     android:viewportWidth="24.0"
     android:viewportHeight="24.0">
     <path
-        android:fillColor="#FF000000"
+        android:fillColor="#C0C0C0"
         android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM13,19h-2v-2h2v2zM15.07,11.25l-0.9,0.92C13.45,12.9 13,13.5 13,15h-2v-0.5c0,-1.1 0.45,-2.1 1.17,-2.83l1.24,-1.26c0.37,-0.36 0.59,-0.86 0.59,-1.41 0,-1.1 -0.9,-2 -2,-2s-2,0.9 -2,2L8,9c0,-2.21 1.79,-4 4,-4s4,1.79 4,4c0,0.88 -0.36,1.68 -0.93,2.25z" />
 </vector>

app/src/main/res/drawable/ic_credits.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="32dp"
-    android:height="32dp"
-    android:viewportWidth="24.0"
-    android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="M1,21h4L5,9L1,9v12zM23,10c0,-1.1 -0.9,-2 -2,-2h-6.31l0.95,-4.57 0.03,-0.32c0,-0.41 -0.17,-0.79 -0.44,-1.06L14.17,1 7.59,7.59C7.22,7.95 7,8.45 7,9v10c0,1.1 0.9,2 2,2h9c0.83,0 1.54,-0.5 1.84,-1.22l3.02,-7.05c0.09,-0.23 0.14,-0.47 0.14,-0.73v-1.91l-0.01,-0.01L23,10z" />
-</vector>

app/src/main/res/drawable/ic_sputnik.xml

@@ -23,9 +23,9 @@
     android:viewportWidth="128"
     android:viewportHeight="128">
     <path
-        android:fillColor="#52C0C0C0"
+        android:fillColor="#FFE082"
         android:pathData="m96.642,31.504c7.911,7.997 17.143,13.584 25.365,15.581l1.754,-3.997C123.78,43.048 123.786,43.005 123.802,42.965 125.834,38.995 127,34.495 127,29.715 127,13.881 114.379,1 98.867,1c-5.125,0 -9.92,1.429 -14.064,3.884l-3.398,1.598c0.08,0.306 0.133,0.599 0.221,0.91 2.32,8.104 7.652,16.667 15.016,24.112z" />
     <path
-        android:fillColor="#52C0C0C0"
+        android:fillColor="#FFE082"
         android:pathData="M93.876,34.3C86.053,26.391 80.369,17.225 77.87,8.49 77.84,8.385 77.818,8.285 77.788,8.181L2.629,43.513c-1.404,0.66 -2.019,2.358 -1.372,3.791 0.472,1.046 1.485,1.663 2.545,1.663 0.392,0 0.79,-0.084 1.169,-0.263L74.045,16.235c-1.873,3.578 -2.997,7.611 -3.228,11.885L35.566,51.732c-1.294,0.866 -1.653,2.638 -0.805,3.957 0.538,0.836 1.431,1.29 2.344,1.29 0.526,0 1.06,-0.151 1.533,-0.469L71.189,34.707c1.4,8.11 6.135,15.044 12.715,19.285l-54.945,68.337c-0.981,1.22 -0.808,3.021 0.388,4.023 0.521,0.437 1.149,0.649 1.775,0.649 0.809,0 1.611,-0.357 2.166,-1.045L89.056,56.595c3.06,1.168 6.357,1.838 9.811,1.838 4.932,0 9.566,-1.312 13.601,-3.597L84.602,118.323c-0.633,1.44 0,3.131 1.41,3.777 0.372,0.17 0.76,0.25 1.144,0.25 1.07,0 2.092,-0.629 2.556,-1.691L120.402,50.739C111.642,48.416 102.042,42.555 93.876,34.3Z" />
 </vector>