replace gulp with webpack, use ES6

Author: Michał Sajnóg

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015"]
+}

.editorconfig

@@ -5,13 +5,10 @@ root = true
 [*]
 charset = utf-8
 end_of_line = lf
-indent_size = 4
+indent_size = 2
 indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 
 [*.md]
 trim_trailing_whitespace = false
-
-[*.scss, *.css]
-indent_size = 2

.travis.yml

@@ -6,7 +6,7 @@ node_js:
 branches:
   only:
     - master
-    - dev
+    - (.+-dev$)|(^dev$)
 
 env:
   global:
@@ -17,7 +17,6 @@ before_install:
 - sh -e /etc/init.d/xvfb start
 
 install:
-- npm install -g gulp
 - npm install -g karma
 - npm install