Document full project. Lots of small fixes

src/utils.lua

@@ -1,5 +1,11 @@
+--- Utils
+-- Helper module for misc operations
+
 local Utils = {}
 
+--- Does a shallow copy of a table and appends it to a target table.
+-- @param orig Table to copy
+-- @param target Table to append to
 function Utils.shallowCopy(orig, target)
 	for key, value in pairs(orig) do
 		target[key] = value