updated histoBook to create histos from config file, fixed error in chainLoader, added tagName in xmlConfig to get the tag for current node path
added 2d type to config made histo
merge in the up to date root boiler code

Merge remote-tracking branch 'upstream/master'
fake change to test upstream changes
adding speudo change from root boiler

Merge remote-tracking branch 'upstream/master'
test upstream
added change from upstream