Merge branch 'master', remote-tracking branch 'origin' into patch-1
Merge pull request #1 from caseyf/patch-1

Add multiget support.
remove unused file lib/memcached/exceptions.rb
update spymemcached-ext-0.0.1.jar
make use of JRubyMethod annotation for add/replace/set/incr/decr with default argument value
implement BasicLibraryService instead of Library
move errors under com.openfeint.memcached.error package
move MarshalTranscoder and MarshalZlibTranscoder to transcoder package
only one initialize method in Memcached
memcached should connect to 127.0.0.1:11211 if no server defined
add namespace support
add Memcached::Rails, only initialize now
alias shutdown to quit
Memcached::Rails parent is Memcached
add active? method in Memcached::Rails
remove private ruby in Memcached.java
multiget now support prefix key
merge get and multiget together
marshal is optional argument for get method
add get/read/exist? methods to Memcached::Rails