Merge branch 'master' into get_len

CHANGELOG

@@ -1,4 +1,6 @@
 
+v0.20.0. Add experimental module, with get_len() operator.
+
 v0.19.10. Add no-op hash (MEMCACHED_HASH_NONE) to skip hashing when there is one server (bierbaum). Updated benchmark.
 
 v0.19.8. Support :noreply behavior.

Manifest

@@ -10,6 +10,7 @@ ext/libmemcached-0.32.tar.gz
 ext/libmemcached-2.patch
 ext/libmemcached-3.patch
 ext/libmemcached-4.patch
+ext/libmemcached-5.patch
 ext/libmemcached.patch
 ext/rlibmemcached.i
 ext/rlibmemcached_wrap.c
@@ -18,6 +19,7 @@ lib/memcached.rb
 lib/memcached/auth.rb
 lib/memcached/behaviors.rb
 lib/memcached/exceptions.rb
+lib/memcached/experimental_memcached.rb
 lib/memcached/integer.rb
 lib/memcached/memcached.rb
 lib/memcached/rails.rb

ext/extconf.rb

@@ -104,7 +104,7 @@ if ENV['SWIG']
   puts "Running SWIG."
   puts(cmd = "swig #{$defines} #{$includes} -ruby -autorename rlibmemcached.i")
   raise "'#{cmd}' failed" unless system(cmd)
-  puts(cmd = "sed -i 's/STR2CSTR/StringValuePtr/' rlibmemcached_wrap.c")
+  puts(cmd = "sed -i '' 's/STR2CSTR/StringValuePtr/' rlibmemcached_wrap.c")
   raise "'#{cmd}' failed" unless system(cmd)
 end