Housekeeping/Consistency Updates

Proposal
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Updated documentation to reflect warning about TFTP file transfers greater than 33MB (originally was labeled 100MB)

Updated documentation explaining the additional SYSLINUX files, their version, and where we got them from

Updated SYSLINUX files to the latest stable version ([6.02](http://www.syslinux.org/wiki/index.php/Syslinux_6_Changelog#Changes_in_6.02))

Minor whitespace and PEP8 consistency changes from #37

Reasoning
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Reasoning behind this pull request is inherently obvious, I'm just trying to be as formal as possible with pulls moving forward.