v1.4.6

• Update nan for node 6 support
• Test on node 6

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• [ef05005754] - Bumped to 1.4.6 (Lars-Magnus Skog)
• [b152b1b393] - Merge pull request #280 from ralphtheninja/master (Lars-Magnus Skog)
• [267586b02b] - bump nan to 2.3.0 to remove deprecated calls (Lars-Magnus Skog)
• [1ef0452f81] - add node 6 to travis (Lars-Magnus Skog)
• [ecb8634762] - Bumped to 1.4.5 (Lars-Magnus Skog)