Ability to disable limitInputPixels #250

Update docs
Added a giant image for testing
Adding myself to contributors
Added tests to verify giant image can be opened
Extend test-win time limit (because of large images)

test/fixtures/index.js

@@ -79,6 +79,7 @@ module.exports = {
   inputPngOverlayLayer2LowAlpha: getPath('alpha-layer-2-ink-low-alpha.png'),
   inputPngAlphaPremultiplicationSmall: getPath('alpha-premultiply-1024x768-paper.png'),
   inputPngAlphaPremultiplicationLarge: getPath('alpha-premultiply-2048x1536-paper.png'),
+  inputPngLarge: getPath('giant-image.png'),
 
   inputWebP: getPath('4.webp'), // http://www.gstatic.com/webp/gallery/4.webp
   inputWebPWithTransparency: getPath('5_webp_a.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp

test/unit/io.js

@@ -876,6 +876,24 @@ describe('Input/output', function() {
       });
     });
 
+    it('Disabling limit works', function(done) {
+      sharp(fixtures.inputPngLarge)
+        .limitInputPixels(false)
+        .toBuffer(function(err) {
+          assert.strictEqual(true, !err);
+          done();
+        });
+    });
+
+    it('Enabling default limit fails works and fails with a large image', function(done) {
+      sharp(fixtures.inputPngLarge)
+        .limitInputPixels(true)
+        .toBuffer(function(err) {
+          assert.strictEqual(true, !!err);
+          done();
+        });
+    });
+
     it('Smaller than input fails', function(done) {
       sharp(fixtures.inputJpg).metadata(function(err, metadata) {
         if (err) throw err;