Add message tips to Awesome and Modern themes.

themes/awesome/awesome.json

@@ -37,5 +37,6 @@
         "src/latex/examples/fonts": "../fonts"
       }
     }
-  }
+  },
+  "message": "Don't forget to run 'xelatex <myresume.tex>' in the generated latex/examples folder to complete your resume build! For more info, see the theme README at https://github.com/fluentdesk/fluent-themes/blob/master/themes/awesome/README.md."
 }

themes/modern/modern.json

@@ -5,5 +5,6 @@
   "engine": "handlebars",
   "palette": {
     "skillLevels": [ "#FFFFFF", "#5CB85C", "#F1C40F", "#428BCA", "#C00000" ]
-  }
+  },
+  "message": "To get colored skill progress bars, make sure your resume includes a `level` element for each skill!"
 }