build: bower.json: remove moot version field

Per bower/spec@a325da3

closes #2144

bower.json: main: fix path to video.js

bower.json: main: video-js.css => video-js.scss

Per bower/spec#43 :
> Use source files with module exports and imports over pre-built distribution files.

Also, the example in that PR includes
/sass/motion.scss in and excludes
/dist/movement.css & /dist/movement.min.css
from its `main`.

bower.json: Set moduleType & use non-dist video.js

Again, see bower/spec#43

bower.json

@@ -1,11 +1,11 @@
 {
   "name": "video.js",
   "description": "An HTML5 and Flash video player with a common API and skin for both.",
-  "version": "5.0.0-15",
   "main": [
-    "dist/video-js/video.js",
-    "dist/video-js/video-js.css"
+    "src/js/video.js",
+    "src/css/video-js.scss"
   ],
+  "moduleType": "es6",
   "keywords": [
     "videojs",
     "html5",

grunt.js

@@ -226,25 +226,25 @@ module.exports = function(grunt) {
         options: {
           release: 'major'
         },
-        src: ['package.json', 'bower.json', 'component.json']
+        src: ['package.json', 'component.json']
       },
       minor: {
         options: {
           release: 'minor'
         },
-        src: ['package.json', 'bower.json', 'component.json']
+        src: ['package.json', 'component.json']
       },
       patch: {
         options: {
           release: 'patch'
         },
-        src: ['package.json', 'bower.json', 'component.json']
+        src: ['package.json', 'component.json']
       },
       prerelease: {
         options: {
           release: 'prerelease'
         },
-        src: ['package.json', 'bower.json', 'component.json']
+        src: ['package.json', 'component.json']
       },
       css: {
         options: {