MOBI-1091 make delay configurable for the delay to remove the duplicate headers.  (could be temporary measure for client to find best value that works for them).

git-svn-id: http://anonsvn.icesoft.org/repo/icemobile/trunk/icemobile@42143 8668f098-c06c-11db-ba21-f49e70c34f74
MOBI-1094.  better to have a 404 to load a non-existent css than a NPE.  introduce none.css for this purpose.

git-svn-id: http://anonsvn.icesoft.org/repo/icemobile/trunk/icemobile@42144 8668f098-c06c-11db-ba21-f49e70c34f74