add CONTRIBUTING.md file

remove TODO.txt and cleanup addon.json

CONTRIBUTING.md

@@ -0,0 +1,3 @@
+# Creating an issue
+
+The issue tracker is for bugs or feature requests. Try to avoid posting issues like "How do I do X?"

TODO.txt

@@ -1,9 +0,0 @@
-fix sounds playing regardless of being hidden when overlap is ticked
-
--- internal
-	have a high level clientside api for changing parts from lua
-	make properties have tags that define what type they are so property translation become less of a mess
-	
--- did it work?
-
-testing committ hook

addon.json

@@ -10,10 +10,8 @@
 		"*.md",
 		"*.bat",
 		"*.7z",
-		"COPYING",
-		"README.md",
-		"TODO.txt",
-		"boneanimlib.txt",
-		".travis.yml"
+		"*.md",
+		"*.yml",
+		"COPYING"
 	]
-}
+}