Update README.md

Author: olliw42

tools/README.md

@@ -1,6 +1,6 @@
 # mLRS - Tools #
 
-This folder includes a set of scripts, libraries, and so, which help with maintaining and devekopping the code. 
+This folder includes scripts, libraries, and so on, which help with maintaining and developping the code. 
 
-Normally, they should not be needed then working on the existing code base. 
+Normally they should not be needed then working on the existing code base.