README typo fixes.

README.md

@@ -9,7 +9,7 @@ Installation:
 
 Requirements:
 
-- Standard tools like g++, cmake etc.
+- Standard tools like g++, cmake, etc.
 - Qt5 (Widgets and Network modules)
 
 Use the following command for getting the sources:
@@ -20,7 +20,7 @@ Change into the new directory:
 
     cd spacetray
 
-To compile the sources just run:
+To compile the sources, run:
 
     mkdir build
     cd build
@@ -73,7 +73,7 @@ The format should look like this:
       0xRR, 0xGG, 0xBB, 0xAA, ...
     };
 
-The image size used in the default theme is 52x48 pixels with 4 channels (RGBA).
+The image size used in the default theme is 52x48 pixels with four channels (RGBA).
 
 To create these arrays from a PNG image, you can use `ImageMagick` to convert the image to raw RGBA data and then format it into a C++ header.
 
@@ -101,4 +101,3 @@ to:
 in:
 
     ./spacetray.cpp
-