Created server, core and plugin directories.
Modified wscript to pass configure
Move jubatus::storage to jubatus::core namespace
change namespace and include guard in regression
create core/src/common

+ move server/common/{type,exception} to core/src/common
+ build libjubaserv_common
Modified include guard macro names and namespace in core/src/stat.
Move jubatus::storage cpp to jubatus::core namespace
Modify jubatus::core::storage incldue guard
Merge remote-tracking branch 'gith/refactoring/core' into refactoring/core
Merge remote-tracking branch 'origin/refactoring/core' into refactoring/core
Merge branch 'refactoring/core' of github.com:jubatus/jubatus into refactoring/core
change namespace and include guard in recommender
Merge branch 'refactoring/core' of github.com:jubatus/jubatus into refactoring/core
Fix wscript for plugin
core/src/classifier  by luo
Modified include guard macro names and namespace in core/src/graph.
Merge branch 'refactoring/core' of github.com:jubatus/jubatus into refactoring/core
fix namespace and include guard in driver
Merge branch 'refactoring/core' of https://github.com/jubatus/jubatus into refactoring/core
core/src/anomaly build successfully