Init with overwin motions

fix #268

autoload/EasyMotion.vim

@@ -16,7 +16,12 @@ let s:DIRECTION = { 'forward': 0, 'backward': 1, 'bidirection': 2}
 
 
 " Init: {{{
+let s:loaded = s:FALSE
 function! EasyMotion#init()
+    if s:loaded
+        return
+    endif
+    let s:loaded = s:TRUE
     call EasyMotion#highlight#load()
     " Store previous motion info
     let s:previous = {}

autoload/EasyMotion/overwin.vim

@@ -1,6 +1,8 @@
 let s:V = vital#of('easymotion')
 let s:HitAHintMotion = s:V.import('HitAHint.Motion')
 
+call EasyMotion#init()
+
 function! EasyMotion#overwin#move(pattern) abort
   return s:HitAHintMotion.move(a:pattern, {
   \   'keys': g:EasyMotion_keys,