v3.0.0 Breaking Changes

[hueniverse]

• removed server helpers (replaced by server methods introduced in v2.5).
• catbox 2.0
  • engine strings changed from 'memory' to 'catbox-memory' (etc. for other
    cache types). Also, projects must explicitly install the catbox-* npm module.
  • server methods result callback changed from function(err, value, isCacheable) to function(err, value, ttl). Also value no longer supports toCache() and getTtl().
• remove DTrace support
  • probes support was never completed and unused.
  • created dependency on a module not yet ported to node 0.12.
  • will be replaced with a new instrumentation API.