Moved the Cornerstone viewport code to an extension. Tons of changes to rollup and package.json files to make everything play nicely

Packages-react/extensions/ohif-cornerstone-extension/rollup.config.js

@@ -0,0 +1,62 @@
+import babel from 'rollup-plugin-babel'
+import commonjs from 'rollup-plugin-commonjs'
+import external from 'rollup-plugin-peer-deps-external'
+import postcss from 'rollup-plugin-postcss'
+import resolve from 'rollup-plugin-node-resolve'
+import url from 'rollup-plugin-url'
+import pkg from './package.json'
+// Deal with https://github.com/rollup/rollup-plugin-commonjs/issues/297
+import builtins from 'rollup-plugin-node-builtins';
+
+const globals =  {
+  'react': 'React',
+  'react-dom': 'ReactDOM',
+  'react-redux': 'ReactRedux',
+  'cornerstone-core': 'cornerstone',
+  'cornerstone-wado-image-loader': 'cornerstoneWADOImageLoader',
+  'dcmjs': 'dcmjs',
+  'dicom-parser': 'dicomParser',
+  'ohif-core': 'OHIF'
+};
+
+export default {
+  input: 'src/index.js',
+  output: [
+    {
+      file: pkg.main,
+      format: 'umd',
+      name: 'ohif-cornerstone-extension',
+      sourcemap: true,
+      globals
+    },
+    {
+      file: pkg.module,
+      format: 'es',
+      sourcemap: true,
+      globals
+    }
+  ],
+  plugins: [
+    builtins(),
+    external(),
+    postcss({
+      modules: false
+    }),
+    url(),
+    babel({
+      exclude: 'node_modules/**',
+      externalHelpers: true,
+      runtimeHelpers: true
+    }),
+    resolve(),
+    commonjs({
+      include: 'node_modules/**',
+      namedExports: {
+          'node_modules/react-is/index.js': [
+            'isValidElementType'
+          ]
+      }
+    })
+  ],
+  external: Object.keys(pkg.peerDependencies || {}),
+}