Added method attribute to HTML4 Strict attributes.
Added method attribute to HTML4 Strict attributes.

The exhaustive list of HTML attributes not covered by blaze are here by
a diff of the HTML4 spec's list[1] and Blaze's export list[2], but all
of them appear to be non-strict and thus non-desirable, apart from
`method', which is actually what prompted my investigation, as I was
trying out Blaze and constructing a form.

-- *Main Data.List> html4attrs \\ blazeattrs --
["accept-charset","alink","background","bgcolor","clear","code",
"color","compact","enctype","face","frameborder","hspace","ismap",
"language","link","longdesc","marginheight","marginwidth","method",
"noresize","noshade","nowrap","object","prompt","scrolling","start",
"target","text","version","vlink","vspace"]

[1]: http://www.w3.org/TR/REC-html40/index/attributes.html
[2]: http://github.com/jaspervdj/BlazeHtml/raw/master/src/Text/Blaze/Html4/Strict/Attributes.hs

mikehat/blaze-all,mikehat/blaze-all,dylex/blaze-markup,iblech/blaze-html,FranklinChen/blaze-markup,jgm/blaze-html,iblech/blaze-html,Soostone/blaze-markup-haste,jgm/blaze-html,dylex/blaze-markup,mikehat/blaze-all,Soostone/blaze-html-haste,jgm/blaze-html,Soostone/blaze-markup-haste,FranklinChen/blaze-markup