Separate cache and http request into two separate Hystrix commands.
Configure distinct name for cache Hystrix command.
Set independent Hystrix configuration from http client,  with default
 timeout 20ms.
Move non-http specific Hystrix class from http.hystrix to ribbon.hystrix
package.
Simplify Hystrix command chain implementation and make it more
efficient for cases when there is no cache and Hystrix information is not needed.
Use _cache suffix in cache hystrix command name.
Rename http client/cache hystrix commands.
Merge pull request #139 from tbak/master

Separate cache and http request into two separate Hystrix commands.