Switched default font from SourceCode Pro to Dejavu

frontend/delta/scss/clipperz.scss

@@ -2,6 +2,8 @@
 @import "core/palette";
 @import "core/parameters";
 @import "core/fonts";
+//@import "core/clipperz-font/source-code-pro";
+@import "core/clipperz-font/dejavu";
 @import "core/flex";
 @import "core/overlay";
 @import "core/behavior";