Spell-check and clarify item names

* Fix inconsistent insulated mesecon names
* Clarify lightstone names
* Rename meselamp to "Mesecon Lamp"
* Use capitalization "Luacontroller" consistently
* Cleanup / improvements for logic gate naming

mesecons_gates/doc/and/description.html

@@ -1 +1 @@
-And gates power their output if both inputs (from left and right) are powered.
+AND gates power their output if both inputs (from left and right) are powered.

mesecons_gates/doc/diode/description.html

@@ -1 +1 @@
-Mesecon diodes, just like real ones, only transfer power (signals) in one direction only.
+Diodes conduct signals in one direction only.

mesecons_gates/doc/nand/description.html

@@ -1 +1 @@
-Nand gates do not power their output if both inputs (from left and right) are powered, but power it in every other case.
+NAND gates do not power their output if both inputs (from left and right) are powered, but power it in every other case.

mesecons_gates/doc/nor/description.html

@@ -1 +1 @@
-Nor gates only power their output if none of their two inputs is powered. They are basically or gates with a not gate at their output.
+NOR gates only power their output if none of their two inputs is powered. They are basically OR gates with a NOT gate at their output.

mesecons_gates/doc/not/description.html

@@ -1 +1 @@
-Not gates invert signals, just like a mesecon torch does, but faster. The input is at the opposite side of the output.
+NOT gates invert signals, just like a mesecon torch does, but faster. The input is at the opposite side of the output.

mesecons_gates/doc/or/description.html

@@ -1 +1 @@
-Or gates power their output if either of their inputs (or both) are powered. You could basically get the same behaviour with two diodes, but or gates save some space.
+OR gates power their output if either of their inputs (or both) are powered. You could basically get the same behaviour with two diodes, but OR gates save some space.