added readme

Author: leongrdic

README.md

@@ -0,0 +1,46 @@
+# imgman
+
+This library uses GD and EXIF (optional) PHP extensions so make sure you have them
+
+Install:
+```
+composer require leongrdic/imgman
+```
+
+
+Example usages:
+```
+use Le\ImgMan\{ImgMan, ImageFormat};
+
+$img = new ImgMan()
+    ->fromDataUrl($dataUrlFromJS)
+    ->cacheExif()
+    ->downscale(2048)
+    ->rotateFromExif()
+    ->output(ImageFormat::jpeg, 75)
+    ->toString();
+```
+
+```
+use Le\ImgMan\{ImgMan, ImageFormat};
+
+new ImgMan()
+    ->fromFile('example.png')
+    ->downscale(1024)
+    ->output(ImageFormat::webp, 80)
+    ->toFile('example.webp');
+```
+
+```
+use Le\ImgMan\{ImgMan, ImageFormat};
+
+new ImgMan()
+    ->fromString($rawImageBytes)
+    ->output(ImageFormat::png, 80)
+    ->toFile('example.png');
+```
+
+# Notice
+
+This library hasn't yet been fully tested and is to be used at your own responsibility.
+Any feedback and improvement suggestions are appreciated!