update README

README.md

@@ -6,12 +6,37 @@ Business Days Calculator
 
 [![Build Status](https://travis-ci.org/andrejsstepanovs/business-days-calculator.png?branch=master)](https://travis-ci.org/andrejsstepanovs/business-days-calculator) [![Scrutinizer Quality Score](https://scrutinizer-ci.com/g/andrejsstepanovs/business-days-calculator/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/andrejsstepanovs/business-days-calculator/)[![Coverage Status](https://coveralls.io/repos/andrejsstepanovs/business-days-calculator/badge.png?branch=master)](https://coveralls.io/r/andrejsstepanovs/business-days-calculator?branch=master) [![Latest Stable Version](https://poser.pugx.org/andrejsstepanovs/business-days-calculator/v/stable.png)](https://packagist.org/packages/andrejsstepanovs/business-days-calculator) [![License](https://poser.pugx.org/andrejsstepanovs/business-days-calculator/license.png)](https://packagist.org/packages/andrejsstepanovs/business-days-calculator)
 
+# Install
 
-# Examples
+    "require": {
+        "andrejsstepanovs/business-days-calculator": "dev-master",
+    }
 
-    $calc = new BusinessDays();
-    $date = new \DateTime('2000-01-01');
+# Examples
 
-    $calc->setStartDate($date);
-    $calc->addBusinessDays(2);
-    var_dump($calc->getDate());
+    use \BusinessDays\Calculator;
+
+    $holidays = [
+        new \DateTime('2000-12-31'),
+        new \DateTime('2001-01-01')
+    ];
+
+    $freeDays = [
+        new \DateTime('2000-12-28')
+    ];
+
+    $freeWeekDays = [
+        Calculator::SATURDAY,
+        Calculator::SUNDAY
+    ];
+
+    $calculator = new Calculator();
+    $calculator->setStartDate(new \DateTime('2000-12-27'));
+    $calculator->setFreeWeekDays($freeWeekDays); // repeat every week
+    $calculator->setHolidays($holidays);         // repeat every year
+    $calculator->setFreeDays($freeDays);         // don't repeat
+
+    $calculator->addBusinessDays(3);             // add X working days
+
+    $result = $calculator->getDate();            // \DateTime
+    echo $result->format('Y-m-d');               // 2001-01-03