Fixed README.md
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
minor #14 Fixed README.md (lyrixx)

This PR was merged into the master branch.

Discussion
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Fixed README.md

Commits
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fce3a27 Fixed README.md
feature #15 Added support for gauge in statsd and null (lyrixx)

This PR was merged into the master branch.

Discussion
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Added support for gauge in statsd and null

Commits
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2f0a665 Added support for gauge in statsd and null
Added Graphite Collector
feature #12 Added Graphite Collector (lyrixx)

This PR was squashed before being merged into the master branch (closes #12).

Discussion
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Added Graphite Collector

Commits
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34587ea Added Graphite Collector
minor #11 Fixed consistency (lyrixx)

This PR was merged into the master branch.

Discussion
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Fixed consistency

Used the same naming convention in stastd than in other class

Commits
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8f215ec Fixed consistency
Move default value to collector itself from fatory

More over, it fixes a bug if user use factory without options,
because factory send null instead of nothing which break everythinh.

And then, it make the collecter easier to re-use