chore(types): split out config interface from configParser

- split out config interface from configParser
- add comments from docs/referenceConf.js to lib/config.ts
- copies lib/config.ts to configuration.ts
- allows for users to `import {Config} from 'protractor/configuration';`

.gitignore

@@ -13,3 +13,4 @@ xmloutput*
 npm-debug.log
 
 *.swp
+configuration.ts

gulpfile.js

@@ -72,7 +72,7 @@ gulp.task('default',['prepublish']);
 
 gulp.task('types', function(done) {
   var folder = 'built';
-  var files = ['browser', 'element', 'locators', 'expectedConditions'];
+  var files = ['browser', 'element', 'locators', 'expectedConditions', 'config'];
   var outputFile = path.resolve(folder, 'index.d.ts');
   var contents = '';
   files.forEach(file => {
@@ -86,6 +86,10 @@ gulp.task('types', function(done) {
 
   // write contents to 'built/index.d.ts'
   fs.writeFileSync(outputFile, contents);
+
+  // copy over config.ts file so users just need to import from 'protractor/config';
+  var configFile = fs.readFileSync(path.resolve('lib/config.ts')).toString();
+  fs.writeFileSync(path.resolve('configuration.ts'), configFile);
   done();
 });