Made the maxFilesize message configurable.

src/dropzone.coffee

@@ -118,6 +118,9 @@ class Dropzone extends Em
     # If null, no text will be added at all.
     dictFallbackText: "Please use the fallback form below to upload your files like in the olden days."
 
+    # If the filesize is too big.
+    dictFileTooBig: "File is too big ({{filesize}}MB). Max filesize: {{maxFilesize}}MB."
+
     # If the file doesn't match the file type.
     dictInvalidFileType: "You can't upload files of this type."
 
@@ -507,7 +510,7 @@ class Dropzone extends Em
   # `acceptedMimeTypes` check.
   accept: (file, done) ->
     if file.size > @options.maxFilesize * 1024 * 1024
-      done "File is too big (" + (Math.round(file.size / 1024 / 10.24) / 100) + "MB). Max filesize: " + @options.maxFilesize + "MB"
+      done @options.dictFileTooBig.replace("{{filesize}}", Math.round(file.size / 1024 / 10.24) / 100).replace("{{maxFilesize}}", @options.maxFilesize)
     else unless Dropzone.isValidMimeType file.type, @options.acceptedMimeTypes
       done @options.dictInvalidFileType
     else

test/test.coffee

@@ -260,15 +260,24 @@ describe "Dropzone", ->
     dropzone = null
     beforeEach ->
       element = Dropzone.createElement """<div></div>"""
-      dropzone = new Dropzone element, url: "url", acceptedMimeTypes: "audio/*,image/png"
+      dropzone = new Dropzone element, maxFilesize: 4, url: "url", acceptedMimeTypes: "audio/*,image/png"
 
     describe ".accept()", ->
 
-      it "should properly accept files which mime types are listed by acceptedMimeTypes", ->
+      it "should pass if the filesize is OK", ->
+        dropzone.accept { size: 2 * 1024 * 1024, type: "audio/mp3" }, (err) -> expect(err).to.be.undefined
+
+      it "shouldn't pass if the filesize is too big", ->
+        dropzone.accept { size: 10 * 1024 * 1024, type: "audio/mp3" }, (err) -> err.should.eql "File is too big (10MB). Max filesize: 4MB."
+
+      it "should properly accept files which mime types are listed in acceptedMimeTypes", ->
 
         dropzone.accept { type: "audio/mp3" }, (err) -> expect(err).to.be.undefined
         dropzone.accept { type: "image/png" }, (err) -> expect(err).to.be.undefined
         dropzone.accept { type: "audio/wav" }, (err) -> expect(err).to.be.undefined
+
+      it "should properly reject files when the mime type isn't listed in acceptedMimeTypes", ->
+
         dropzone.accept { type: "image/jpeg" }, (err) -> err.should.eql "You can't upload files of this type."