Use this instead of @ in CoffeeScript

We're using `this` most of the time, and it's what's used in JavaScript.

app/assets/javascripts/documentable.js.coffee

@@ -17,9 +17,9 @@ App.Documentable =
 
   initializeDirectUploadInput: (input) ->
 
-    inputData = @buildData([], input)
+    inputData = this.buildData([], input)
 
-    @initializeRemoveCachedDocumentLink(input, inputData)
+    this.initializeRemoveCachedDocumentLink(input, inputData)
 
     $(input).fileupload
 

app/assets/javascripts/imageable.js.coffee

@@ -18,9 +18,9 @@ App.Imageable =
 
   initializeDirectUploadInput: (input) ->
 
-    inputData = @buildData([], input)
+    inputData = this.buildData([], input)
 
-    @initializeRemoveCachedImageLink(input, inputData)
+    this.initializeRemoveCachedImageLink(input, inputData)
 
     $(input).fileupload
 

app/assets/javascripts/legislation_annotatable.js.coffee

@@ -85,7 +85,7 @@ App.LegislationAnnotatable =
       return
 
   customShow: (position) ->
-    $(@element).html ""
+    $(this.element).html ""
     # Clean comments section and open it
     $("#comments-box").html ""
     App.LegislationAllegations.show_comments()
@@ -96,8 +96,8 @@ App.LegislationAnnotatable =
       method: "GET"
       url: "#{annotation_url}/annotations/new"
       dataType: "script").done (->
-        $("#new_legislation_annotation #legislation_annotation_quote").val(@annotation.quote)
-        $("#new_legislation_annotation #legislation_annotation_ranges").val(JSON.stringify(@annotation.ranges))
+        $("#new_legislation_annotation #legislation_annotation_quote").val(this.annotation.quote)
+        $("#new_legislation_annotation #legislation_annotation_ranges").val(JSON.stringify(this.annotation.ranges))
         $("#comments-box").css({ top: position.top - $(".calc-comments").offset().top })
 
         unless  $("[data-legislation-open-phase]").data("legislation-open-phase") == false

app/assets/javascripts/table_sortable.js.coffee

@@ -12,9 +12,9 @@ App.TableSortable =
     $("table.sortable th").click ->
       table = $(this).parents("table").eq(0)
       rows = table.find("tbody tr").toArray().sort(App.TableSortable.comparer($(this).index()))
-      @asc = !@asc
+      this.asc = !this.asc
 
-      if @asc
+      if this.asc
         table.append rows
       else
         table.append rows.reverse()