Improve send command fn
Add svaka readme
Improve the Query interface
Decouple the system like jig
* Component lifecycle management v1 is done
  - TODO
     - auto resolve symbol
     - component can have its default config
     - improve component dependency handle
     - each triggered component is visible, current is visible when the whole is done
     - solve problem that the defrecord with component must have a field
Schema enable
Ring middleware to pretty print exception
Support halt lifecycle
Pretty exception middleware

* the halt lifecycle only be used when shutdown system
* the elastic can be started and shutdown by the lifecycle
* Support component production config or from main args
* style index
Merge pull request #3 from weejulius/svaka_init

Svaka init