Introduce automated tests, de-lint, and migrate towards best practices

.eslintrc.js

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+module.exports = {
+    'rules': {
+        // TODO add a logger lib to the project
+        // 'no-console': 2
+        'brace-style': [2, '1tbs'],
+        'camelcase': 1,
+        'comma-dangle': [2, 'never'],
+        'comma-spacing': [2, { 'before': false, 'after': true }],
+        'comma-style': [2, 'last'],
+        'eqeqeq': 2,
+        'indent': [2, 4],
+        'key-spacing': [2, { 'beforeColon': false, 'afterColon': true }],
+        'linebreak-style': [2, 'unix'],
+        'no-console': 0,
+        'no-redeclare': 0,
+        'no-underscore-dangle': 0,
+        'no-unused-vars': 0,
+        'object-curly-spacing': [2, 'always'],
+        'quotes': [2, 'single'],
+        'semi': [2, 'always'],
+        'semi-spacing': [2, { 'before': false, 'after': true }],
+        'space-after-keywords': 2,
+        'space-before-blocks': [2, 'always'],
+        'space-before-function-paren': [2, { 'anonymous': 'always', 'named': 'never' }],
+        'space-before-keywords': 2,
+        'space-in-parens': [2, 'never'],
+        'space-infix-ops': 2,
+        'strict': 0
+    },
+    'env': {
+        'node': true
+    },
+    'extends': 'eslint:recommended'
+};
+

.gitignore

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+node_modules
+.DS_Store
+npm-debug.log
+Excel.xlsx