Haproxy-log-analysis

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- Allow hostnames to have a dot in it.
[gforcada]

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- Handle unparsable HTTP requests.
[gforcada]

- Only test on python 2.7 and 3.5
[gforcada]

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- Check the divisor before doing a division to not get ``ZeroDivisionError`` exceptions.
[gforcada]

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- Major refactoring:

Rename modules and classes:

- haproxy_logline -> line
- haproxy_logfile -> logfile
- HaproxyLogLine -> Line
- HaproxyLogFile -> Log

Parse the log file on Log() creation (i.e. in its __init__)

[gforcada]

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- New filter: ``filter_wait_on_queues``.
Get all requests that waited at maximum X amount of milliseconds on HAProxy queues.
[gforcada]

- Code/docs cleanups and add code analysis.
[gforcada]

- Avoid using eval.
[gforcada]

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- Support -1 as a status_code
[Christopher Baines]