added new README

README.md

@@ -1 +1,10 @@
-# tacview-splitter-rust
+# tacview-splitter
+
+a rust program that splits a tacview file by coalition
+ 
+## 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`).