Solution for three challenges (noops-challenge#21)

* feature: add solution for 10print

* feature: add solution to the hexcode challenge

* feature: add solution for conways game of life

* chore: add screenshot to conway solution

challenges/10print/entries/benrgreene/10print.js

@@ -0,0 +1 @@
+while(1){process.stdout.write(Math.random() > .5 ? '\\' : '/')}

challenges/10print/entries/benrgreene/README.md

@@ -0,0 +1,13 @@
+# 10Print JS
+
+Solution to the 10Print challenge
+
+## Run the program
+
+This runs in terminal, and requires that NodeJS is installed
+
+```
+node 10print.js 
+```
+
+**NOTE**: this runs infinitely, hit 'Control + C' to exit the program

challenges/conways-life/entries/benrgreene/README.md

@@ -0,0 +1,47 @@
+# Conway's Game of Life
+
+JS based implementation of Conway's game of life.
+
+## Run
+
+This requires NodeJS, and is run in the terminal:
+
+```
+node conway.js
+```
+
+## Explanation
+
+Here's the unminified JS code to look over:
+
+```
+const nextStage = (array) => {
+  const newArray = [];
+  for (let i = 0; i < array.length; i++) {
+    newArray[i] = [];
+    for (let j = 0; j < array[i].length; j++) {
+      // count up all the different cells around the current cell. 
+      let l = [[i, j-1],[i, j+1],[i-1, j-1],[i-1, j],[i-1, j+1],[i+1, j-1],[i+1, j],[i+1, j+1]].reduce((count, p) => {
+        let a = array[p[0]] || []
+        return count + (a[p[1]] || 0)
+      }, 0);
+      // check how many living cells are around, and based on that AND current status, set the new status of the cell
+      newArray[i][j] = array[i][j] == 1 ? (l < 2 ? 0 : (l < 4 ? 1 : (l > 3 ? 0 : 1))) : (l == 3 ? 1 : 0)
+    }
+  }
+  return newArray;
+}
+// build a new random board, first need a new array representing the different rows
+let board = new Array(20).fill(0).map(() => { 
+  // build an array of the columns in the rows.
+  return new Array(20).fill(0).map(() => {
+    // random number of whether the cell starts with life
+    return Math.floor(Math.random() * 2)
+  })
+})
+// infinitely rebuild the board
+while(1) {
+  board = nextStage(board);
+  console.log(board);
+}
+```

challenges/hexcode/entries/benrgreene/README.md

@@ -0,0 +1,11 @@
+# Hexcode
+
+This is a JS based solution to the hexcode challenge. 
+
+## Run
+
+This requires NodeJS to run:
+
+```
+node hexcode.js
+```

challenges/hexcode/entries/benrgreene/hexcode.js

@@ -0,0 +1 @@
+let i=0;while(i<16777216){let a=i.toString(16);console.log(`#${'0'.repeat(6-a.length)}${a}`);i++}