* swarm/network: simplify kademlia/hive; rid interfaces
* swarm, swarm/network/stream, swarm/netork/simulations,, swarm/pss: adapt to new Kad API
* swarm/network: minor changes re review; add missing lock to NeighbourhoodDepthC
* cmd/swarm: minor cli flag text adjustments
* swarm/api/http: sticky footer for swarm landing page using flex
* swarm/api/http: sticky footer for error pages and fix for multiple choices
* cmd/swarm, swarm/storage, swarm: fix mingw on windows test issues
* cmd/swarm: update description of swarm cmd
* swarm: added network ID test
* cmd/swarm: support for smoke tests on the production swarm cluster
* cmd/swarm/swarm-smoke: simplify cluster logic as per suggestion
* swarm: propagate ctx to internal apis (#754)
* swarm/metrics: collect disk measurements
* swarm/bmt: fix io.Writer interface
* Write now tolerates arbitrary variable buffers
* added variable buffer tests
* Write loop and finalise optimisation
* refactor / rename
* add tests for empty input
* swarm/pss: (UPDATE) Generic notifications package (#744)
swarm/pss: Generic package for creating pss notification svcs
* swarm: Adding context to more functions
* swarm/api: change colour of landing page in templates
* swarm/api: change landing page to react to enter keypress
