Added in new merge method, and run it on plugins. Also made it so plugin configs can be set anywhere, even if we don't know the plugin beforehand.

data/core/common.lua

@@ -17,6 +17,14 @@ function common.clamp(n, lo, hi)
 end
 
 
+function common.merge(a, b)
+  local t = {}
+  for k, v in pairs(a) do t[k] = v end
+  if b then for k, v in pairs(b) do t[k] = v end end
+  return t
+end 
+
+
 function common.round(n)
   return n >= 0 and math.floor(n + 0.5) or math.ceil(n - 0.5)
 end

data/core/config.lua

@@ -30,10 +30,16 @@ config.borderless = false
 config.tab_close_button = true
 config.max_clicks = 3
 
--- Disable plugin loading setting to false the config entry
--- of the same name.
 config.plugins = {}
+-- Allow you to set plugin configs even if we haven't seen the plugin before.
+setmetatable(config.plugins, { 
+  __index = function(t, k) 
+    if rawget(t, k) == nil then rawset(t, k, {}) end 
+    return rawget(t, k) 
+  end 
+})
 
+-- Disable these plugins by default.
 config.plugins.trimwhitespace = false
 config.plugins.lineguide = false
 config.plugins.drawwhitespace = false