Sass & Class Renames (#759)

* - add autoprefixer
- add cssnano
- add postcss-loader
- remove unused packages

* create RTL scss module

* add vs__ prefix to open-indicator, extract to module

* module for dropdown-toggle

* vs__clear module

* vs__dropdown-menu module

* rename `selected-tag` to `vs__selected`

* remove rtl class

* remove dropdown class

* search-input scss module

* move animations to global module

* refactor dropdown list items

* - spinner slot is now scoped with `loading` variable
- move spinner to scss module

* apply vs__search class directly to search input: if you're using the slot, you might not want default styles

* finish global modules

* make RTL a component state

* - update component states to use vs-- prefix
- rename dropdownClasses to stateClasses

* remove unused property

* Closes #760

* fix states

* more state fixes

* rename .close to vs__deselect

* - simplify dev.html
- start on 'sandbox' development

* update build

* - update webpack config
- move Sandbox to VuePress folder

* update external framework version links

* assign grid areas, ensure 100% height outside of docs

* limit specificity

* first pass at assigning variables

* assign 'darkest'

* remove max-height prop

* rename 'component' variables to 'state'

* update badges

* add deprecation notice to docs

* bump travis config

* add coveralls coverage reporter

* bump netlify config

* additional pass pulling up to variables

* start converting to SVG icons

* middle align action icons

* update netlify config

* netlify bump

* fix travis

* fix travis

* try lcov

* netlify attempt

* prune old packages

* bump travis config

tests/unit/Deselecting.spec.js

@@ -4,7 +4,7 @@ describe("Removing values", () => {
   it("can remove the given tag when its close icon is clicked", () => {
     const Select = selectWithProps({ multiple: true, value: ["foo"] });
 
-    Select.find(".close").trigger("click");
+    Select.find(".vs__deselect").trigger("click");
     expect(Select.vm.mutableValue).toEqual([]);
   });
 
@@ -16,7 +16,7 @@ describe("Removing values", () => {
       disabled: true
     });
 
-    Select.find(".close").trigger("click");
+    Select.find(".vs__deselect").trigger("click");
     expect(Select.vm.mutableValue).toEqual(["one"]);
   });
 
@@ -68,7 +68,7 @@ describe("Removing values", () => {
       });
 
       expect(Select.vm.mutableValue).toEqual("foo");
-      Select.find("button.clear").trigger("click");
+      Select.find("button.vs__clear").trigger("click");
       expect(Select.vm.mutableValue).toEqual(null);
     });
 
@@ -79,7 +79,7 @@ describe("Removing values", () => {
         disabled: true
       });
 
-      expect(Select.find("button.clear").attributes().disabled).toEqual(
+      expect(Select.find("button.vs__clear").attributes().disabled).toEqual(
         "disabled"
       );
     });