Public/private gists added. Fixes #238

Gists are now private by default with a option for public.

src/styles/_components.scss

@@ -46,6 +46,7 @@
 
 // BUTTON
 .maputnik-button {
+  display: inline-block;
   cursor: pointer;
   background-color: $color-midgray;
   color: $color-lowgray;

src/styles/_modal.scss

@@ -21,6 +21,10 @@
   flex-shrink: 0;
 }
 
+.maputnik-modal-sub-section {
+  margin-top: $margin-1;
+}
+
 .maputnik-modal-section--shrink {
   flex-shrink: 1;
 }