Travis builds/tests are failing

[joelpurra]

Building and testing on Travis hasn't worked properly since June 2015.

• The current issues seems to stem from This version of node/NAN/v8 requires a C++11 compiler during compilation for iojs v3 and most likely major node versions higher than v0.12 (untested). It's just a configuration issue.
• For node v0.10 and v0.12 one test seems to be failing (see below). Could it be a timeout?

  1) getdns test TLSHostname TLS hostname validation should return successfully:
     Error: expected { msg: 'Error issuing query', code: 1 } to be falsy
      at Assertion.assert (node_modules/expect.js/index.js:96:13)
      at Assertion.ok (node_modules/expect.js/index.js:115:10)
      at Function.ok (node_modules/expect.js/index.js:499:17)
      at test/test.js:321:39
      at Context.ctx.general (getdns.js:50:27)
      at Context.<anonymous> (test/test.js:320:13)

[joelpurra]

With tests passing locally since #6 and on Travis (for node 4, 5, 6) since #12, I'm closing this.