- Rework of interfaces

This release introduces breaking changes in some go-micro interfaces

- Move misc to util package

- Add register ttl and interval flags
- Fix protoc-gen-micro example

- Add consul TCP check

- Atomic increment rpc stream sequence

- Support consul services without version

- Switch to stdlib context

- Add WatchOption which allows filtering by service

- Add Options method to registry
- Add Conflict error
- Only watch selected services in cache

- https support for consul

- subscriber deadlock fix
- selector top level option

Performance improvements

- http broker using a registry cache
- selector lazy loading the watcher
- selector cache withstand registry failure
- selector cache used by default
- connection pooling set to 1 by default

- sort handler/subscriber endpoints

- pass options to new subscriber

Bug fix nil consul http client

respond when codec errors out