fix debug msg spelling
Add HEADER to Constants
Restructure parser interface

Bring out a more complete CsvParser.Setup object, which can be used in
the StoreView/Inspect/Parser API pages to allow more control over
not-yet-parsed data.  In particular, the Parser page can view the
unparsed data and show how it would parse with or without the 1st row as
a header.  Currently this flag is not tied back into the parser, but at
least the data is now available.  Major cleanups of StoreView display of
unparsed data.
Merge branch 'master' of https://github.com/0xdata/h2o

Conflicts:
	prj.el