Add solution directories for exercises

09_palindromes/solution/palindromes-solution.js

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+const palindromes = function (string) {
+    processedString = string.toLowerCase().replace(/[^a-z]/g, '');
+    return processedString.split('').reverse().join('') == processedString;
+};
+
+module.exports = palindromes;

09_palindromes/solution/palindromes-solution.spec.js

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+const palindromes = require('./palindromes-solution');
+
+describe('palindromes', () => {
+    test('works with single words', () => {
+        expect(palindromes('racecar')).toBe(true);
+    });
+    test.skip('works with punctuation ', () => {
+        expect(palindromes('racecar!')).toBe(true);
+    });
+    test.skip('works with upper-case letters ', () => {
+        expect(palindromes('Racecar!')).toBe(true);
+    });
+    test.skip('works with multiple words', () => {
+        expect(palindromes('A car, a man, a maraca.')).toBe(true);
+    });
+    test.skip('works with multiple words', () => {
+        expect(
+            palindromes('Animal loots foliated detail of stool lamina.')
+        ).toBe(true);
+    });
+    test.skip("doesn't just always return true", () => {
+        expect(palindromes('ZZZZ car, a man, a maraca.')).toBe(false);
+    });
+});