Very initial work at togglable darktheme.

Dammit @alexdaniel654 just when I had my scope creep kinda under control. It'll be v. nice to have though...!

RIGS/static/scss/_custom-variables.scss

@@ -8,4 +8,4 @@ $theme-colors: (
   "danger": #A94447,
   "info": #B8FAFF,
   "primary": #4CB8F1
-);
+) !default;

RIGS/static/scss/screen.scss

@@ -1,3 +1,9 @@
+[data-theme='dark'] {
+    @import "custom-variables";
+    @import 'node_modules/@forevolve/bootstrap-dark/scss/bootstrap-dark.scss';
+    background: #222;
+    color: white;
+}
 @import "custom-variables";
 @import "node_modules/bootstrap/scss/bootstrap";