add memcached
update go version
textproc: remove string workaround for rune formatting

bugfix released in go 1.4 :)
https://code.google.com/p/go/issues/detail?id=8275
kvstore refactor: start: move to kvstore-old/ and remove references
kvstore interfaces and UncommittedTransaction helpers
kvstore: sqlite3bind with bugfix
kvstore: memkv and store tests
kvstore: rename memkv → mem
kvstore: sqlite3
kvstore: mysql
kvstore: postgresql
kvstore/test: fix package name in docs: kvtest → kvstore
kvstore: prefix store