Full tests

[davidmarkclements]

depends on #74

• refactors tests to use tap (for consistency with mininet tapenet)
• uses https://npm.im/get-port
  • avoids accidental reliance on hard coded ports
  • avoids port collisions with other running process on machine
  • keeps tests atomic (opened ports are a sort of shared state)
  • elimination of port collisions within each test allows for parelllization which allows for fasting test runs - especially useful when some of the tests have long timeouts
• uses async test functions, useful for declarative/procedural test code (especially useful with get-port which is promised based)
• use the https://npm.im/nonsynchronous library for preserving API readability (e.g. using callback based API's as is within an async function so that the tests help to document the APIs)

[davidmarkclements]

• 100% cov achieved
• token support added
• wasteland integration tests with the exception of this single assertion: https://github.com/bitfinexcom/wasteland/blob/master/test/integration.grenache-backend.js#L327 which checks that k is undefined. This is because we're supplying k whereas current does not. Unless it's some sort of security reason for not including k (?) then I'd say let's update the wasteland assertion instead of removing k. PR HERE: rm unnecessary assert for compat with grape@next wasteland#8
• waiting for propagate mutable put update errors + store prefixing holepunchto/hyperdht#26 release before this can be merged
• the id values are 32 byte whereas current is 20 byte, if necessary we can sha1 the 32byte id's to make then 20 byte, but this will be extra overhead (cpu, maintenance, debugging) which we'd probably want to avoid if possible

[robertkowalski]

lgtm