Logo change

Change logo from XTF default to NY3Rs-created logo. Changes required to
brand/default.xml
Delete nyeadpilot.jpg

New version with smaller dimensions being uploaded
Update eadcbs7.xsl

Change altformavailable to correct element name altformavail
dsc4.xsl list of container type variables expanded

Variables define list of acceptable values to be used in container type attribute. List expanded to be more inclusive.
Create dsc3nyead.xsl

Possible alternative to dsc4 or dsc6 to display container values. It contains extra, idiosyncratic stuff that could easily be deleted. I could not get the other stylesheets to produce the desired results. One thing lacking here is indenting that relates to the hierarchy of series, subseries, etc.
Update dsc3nyead.xsl
merging jmbewley pull request
Merge branch 'master' of github.com:senyzspalding/ny3rs-xtf