cleaning up build
moved most includes of windows.h to llwin32headers.h to disable min/max macros, etc
streamlined Time class and consolidated functionality in BlockTimer class
llfasttimer is no longer included via llstring.h, so had to add it manually in several places
Added "HttpOnly" to the allowed field names in LLPluginCookieStore::Cookie::parse(). (This was the actual cause of the failure -- cookies with this field in them were silently failing to parse.)
Added some LL_WARNS logging on this sort of cookie parse failure, which will make similar problems much easier to track down in future.
Also added tags to most of the logging in llplugincookiestore.cpp to make it easier to selectively enable it when debugging.
Added a cookie with all allowable field names to the unit test.
Reviewed by Sam at http://codereview.lindenlab.com/1247014
Richard Linden