moved .less files into the vanilla theme folder

.gitignore

@@ -9,6 +9,7 @@ config.json
 public/config.json
 public/css/*.css
 public/themes/*
+!/public/themes/vanilla
 *.sublime-project
 *.sublime-workspace
 plugins/*

public/css/nodebb.less

@@ -1,13 +1 @@
-@import "style";
-
-@import "topic";
-@import "category";
-@import "noscript";
-@import "home";
-@import "header";
-@import "account";
-@import "search";
-@import "unread";
-@import "admin";
-@import "users";
-@import "footer";
+@import "../themes/vanilla/vanilla.less";

public/themes/vanilla/vanilla.less

@@ -0,0 +1,12 @@
+@import "style";
+@import "topic";
+@import "category";
+@import "noscript";
+@import "home";
+@import "header";
+@import "account";
+@import "search";
+@import "unread";
+@import "admin";
+@import "users";
+@import "footer";