updated README

README.md

@@ -1,7 +1,16 @@
 # tacview-splitter
 
- a python script that splits a tacview file by coalition
+a python program that splits a tacview file by coalition
  
- ## Usage
- 
- Put the name of the file in the script, and run the script with python. Only Python 3 supported.
+## Usage
+Put the executable and the tacview file you want split up in the same directory, and execute the program.
+
+The program processes the first file it finds, therefore make sure to only have one tacview file in the directory.
+
+Supports both zipped and ASCII tacview files (`.zip.acmi` and `.txt.acmi`).
+
+## building
+Requires Python 3.
+
+`pyinstaller --onefile tacview-splitter.py`
+