chore(docs): setting up dgeni and circle CI

gulpfile.js

@@ -0,0 +1,13 @@
+var gulp = require('gulp');
+var minimist = require('minimist');
+
+var flagConfig = {
+  string: ['port', 'version', 'ngVersion', 'animations'],
+  boolean: ['dry-run'],
+  alias: {'p': 'port', 'v': 'version', 'a': 'ngVersion'},
+  default: { port: 8000 }
+};
+var flags = minimist(process.argv.slice(2), flagConfig);
+
+/* Docs tasks */
+require('./scripts/docs/gulp-tasks')(gulp, flags);