Fixed statsd collector when stastd is down
minor #16 Fixed statsd collector when stastd is down (lyrixx)

This PR was squashed before being merged into the master branch (closes #16).

Discussion
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Fixed statsd collector when stastd is down

Code to reproduce:

    <?php

    // Note: nothing listen on port 12345!!
    $fp = fsockopen("udp://localhost", 12345, $errno, $errstr, 1.0);
    var_dump($fp, $errno, $errstr); // Everything OK
    fwrite($fp, "1"); // OK
    fwrite($fp, "1"); // KO
    fclose($fp);

    echo "END";

Note:

No need to try catch, no exception can be trowed, and actually the code catch only `Beberlei\Metrics\Exception` which does not exist.

Commits
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22a82b0 Fixed statsd collector when stastd is down