Added day 18 part 2

Author: Gentleman1983

build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 // project meta data
 group 'de.havox_design.aoc2015'
-version '0.17.2'
+version '0.17.3'
 
 // Switch to gradle "all" distribution.
 wrapper {

day18/README.md

@@ -75,3 +75,62 @@ After 4 steps:
 After 4 steps, this example has four lights on.
 
 In your grid of 100x100 lights, given your initial configuration, **how many lights are on after 100 steps**?
+
+# Part Two
+You flip the instructions over; Santa goes on to point out that this is all just an implementation of 
+[Conway's Game of Life](https://en.wikipedia.org/wiki/Conway's_Game_of_Life). At least, it was, until you notice that 
+something's wrong with the grid of lights you bought: four lights, one in each corner, are stuck on and can't be turned 
+off. The example above will actually run like this:
+```
+Initial state:
+##.#.#
+...##.
+#....#
+..#...
+#.#..#
+####.#
+
+After 1 step:
+#.##.#
+####.#
+...##.
+......
+#...#.
+#.####
+
+After 2 steps:
+#..#.#
+#....#
+.#.##.
+...##.
+.#..##
+##.###
+
+After 3 steps:
+#...##
+####.#
+..##.#
+......
+##....
+####.#
+
+After 4 steps:
+#.####
+#....#
+...#..
+.##...
+#.....
+#.#..#
+
+After 5 steps:
+##.###
+.##..#
+.##...
+.##...
+#.#...
+##...#
+```
+After `5` steps, this example now has `17` lights on.
+
+In your grid of 100x100 lights, given your initial configuration, but with the four corners always in the on state, 
+**how many lights are on after 100 steps**?