Merge pull request #16 from mmattioli/master

Disable iPXE, HTTP, and DHCP by Default, Minor Reliability Improvements, Minor Bug Fix
added PEP8 to todo
added PEP8 to todo
undo merge bork
added kwargs to todo
fixed tab/space mix
\x00 -> chr(0)
added to todo removal of /24
added PXE spec reference
started on the documentation
documentation w/o proxyDHCP
added unfinished note to docs
Merge pull request #7 from psychomario/master

update from original