docs update

Updated some docs stuff

docs/objects/Object/onChar.md

@@ -0,0 +1,25 @@
+# onChar
+
+`onChar(self, event, char)`<br>
+The computercraft event which triggers this method is `char`.
+
+The char event always happens after the key event (just like in cc:tweaked)
+
+Here is a example on how to add a onChar event to your frame:
+
+```lua
+local basalt = require("basalt")
+
+local main = basalt.createFrame()
+local subFrame = main:addFrame()
+  :setPosition(3,3)
+  :setSize(18,6)
+  :hide()
+
+function openSubFrame(self, event, char)
+  if(char=="a")then
+    subFrame:show()
+  end
+end
+main:onChar(openSubFrame)
+```