Merge branch 'release/0.4.3' into develop
Merge branch 'master' into develop
rewrite kvs_serv.* based on kvs_serv.tmpl.*

+ fix kvs_serv.tmpl.* compilation errors
fix kvs_serv.tmpl.* by hand ( need fix jenerator )
fix namespace and include file hierarchy by hand
re-create *.tmpl.* by new jenerator and rewrite serv.* based on them

+ re-create *.tmpl.*, kvs_impl, kvs_keeper by new jenerator
+ rewrite kvs_serv.* based on new jenerator's tmpl
+ related jubatus issue #319
bump to version 0.4.4

+ now, jubatus 0.4.4 is required
+ fix typo
Merge branch 'release/0.4.4'