feat(generators): add Sass import reminder to page generator

Addresses #5467
 ionic-team/ionic-cli#773.

Author: tlancina

tooling/generators/page/index.js

@@ -1,4 +1,5 @@
 var path = require('path'),
+    fs = require('fs'),
     Generator = require('../../generator');
 
 module.exports = PageGenerator;
@@ -11,4 +12,25 @@ function PageGenerator(options) {
 
 PageGenerator.prototype = Object.create(Generator.prototype);
 
+Generator.prototype.renderTemplates = function renderTemplates() {
+  var templates = this.loadTemplates();
+  var scssPath = null;
+
+  templates.forEach(function(template) {
+    var renderedTemplate = this.renderTemplate(template);
+    var renderedTemplateDest = path.join(this.appDirectory, 'app', this.directory, this.fileName, this.fileName + template.extension);
+    if (template.extension === '.scss') {
+      scssName = this.fileName + template.extension;
+      scssPath = renderedTemplateDest;
+    }
+    console.log('√ Create'.blue, path.relative(this.appDirectory, renderedTemplateDest));
+    fs.writeFileSync(renderedTemplateDest, renderedTemplate);
+  }, this);
+
+  console.log(('\nDon\'t forget to add an import for ' + scssName + ' ' + 'in ' +
+               path.join('app', 'themes', 'app.core.scss') + ':\n\n  @import ' +
+               path.relative(path.join(this.appDirectory, 'app', 'themes'), scssPath) +
+               '\n').green);
+}
+