Default theme folder can be configured

src/theme.config.example

@@ -76,6 +76,9 @@
             Folders
 *******************************/
 
+/* Path to default theme folder */
+@defaultThemeFolder : 'default';
+
 /* Path to theme packages */
 @themesFolder : 'themes';
 

src/theme.less

@@ -13,7 +13,7 @@
 ---------------------*/
 
 /* Default site.variables */
-@import "@{themesFolder}/default/globals/site.variables";
+@import "@{themesFolder}/@{defaultThemeFolder}/globals/site.variables";
 
 /* Packaged site.variables */
 @import "@{themesFolder}/@{site}/globals/site.variables";
@@ -30,7 +30,7 @@
 ---------------------*/
 
 /* Default */
-@import "@{themesFolder}/default/@{type}s/@{element}.variables";
+@import "@{themesFolder}/@{defaultThemeFolder}/@{type}s/@{element}.variables";
 
 /* Packaged Theme */
 @import (optional) "@{themesFolder}/@{theme}/@{type}s/@{element}.variables";
@@ -56,6 +56,7 @@
 -------------------*/
 
 .loadUIOverrides() {
+  @import (optional) "@{themesFolder}/@{defaultThemeFolder}/@{type}s/@{element}.overrides";
   @import (optional) "@{themesFolder}/@{theme}/@{type}s/@{element}.overrides";
   @import (optional) "@{siteFolder}/@{type}s/@{element}.overrides";
 }