Moved source/utils to source/Grid/GridUtils for better organization

Author: bvaughn

source/Grid/Grid.js

@@ -7,7 +7,7 @@ import {
   getVisibleCellIndices,
   initCellMetadata,
   updateScrollIndexHelper
-} from '../utils'
+} from './GridUtils'
 import cn from 'classnames'
 import raf from 'raf'
 import getScrollbarSize from 'dom-helpers/util/scrollbarSize'

source/utils.js source/Grid/GridUtils.jssource/utils.js renamed to source/Grid/GridUtils.js

@@ -6,7 +6,7 @@ import {
   getVisibleCellIndices,
   initCellMetadata,
   updateScrollIndexHelper
-} from './utils'
+} from './GridUtils'
 
 // Default cell sizes and offsets for use in below tests
 function getCellMetadata () {