build clean should ignore dotfiles

CHANGELOG

@@ -1,3 +1,7 @@
+2.0.13.1
+====
+build --clean shouldn't remove dotfiles
+
 2.0.13
 ====
 middleman build --clean keeps the build directory clean of leftover files

lib/middleman/builder.rb

@@ -68,6 +68,7 @@ module Middleman
     def queue_current_paths_from(destination)
       @cleaning_queue = []
       Find.find(destination) do |path|
+        next if path.match(/\/\./)
         unless path == destination
           @cleaning_queue << path.sub(destination, destination[/([^\/]+?)$/])
         end

lib/middleman/version.rb

@@ -1,3 +1,3 @@
 module Middleman
-  VERSION = "2.0.13"
+  VERSION = "2.0.13.1"
 end