Merge pull request #65 from Fraser999/routing_v2

Routing v2
linux compile fixes
Added another test for sorted vectors and confirming closest node.
Merge branch 'routing_v2' of github.com:fraser999/MaidSafe-Common into routing_v2
Merge remote-tracking branch 'maidsafe/next' into routing_v2
Merge branch 'routing_v2' of github.com:fraser999/MaidSafe-Common into routing_v2
Merge branch 'routing_v2' of github.com:fraser999/MaidSafe-Common into routing_v2
removed templated enum - back to enum class for now
Merge branch 'routing_v2' of github.com:dirvine/MaidSafe-Common into routing_v2
lru cache and tests
Merge remote-tracking branch 'dirvine/routing_v2' into routing_v2