feat(SublimeText2.UtilPackages): cache packages

EthanBrown.SublimeText2.UtilPackages/tools/PackageCache/AdvancedNewFile/messages/install.txt

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+Thank you for installing the AdvancedNewFile plugin.
+
+For more information please visit https://github.com/skuroda/Sublime-AdvancedNewFile.
+
+Note you may need to restart Sublime Text 2 after installing this plugin.
+
+If you have any questions, comments, or run into issues, please let me know! Hope you enjoy the plugin.
+
+Thank you!