Change default length of attribs in xmlreader. Closes #120 on github.
Change default length of attribs in xmlreader. Closes #120 on github.

smharper/openmc,shenqicang/openmc,amandalund/openmc,mjlong/openmc,sxds/opemmc,mit-crpg/openmc,johnnyliu27/openmc,paulromano/openmc,mjlong/openmc,johnnyliu27/openmc,keadyk/openmc_mg_prepush,lilulu/openmc,samuelshaner/openmc,smharper/openmc,johnnyliu27/openmc,nhorelik/openmc,wbinventor/openmc,walshjon/openmc,sxds/opemmc,smharper/openmc,samuelshaner/openmc,mit-crpg/openmc,bhermanmit/cdash,lilulu/openmc,samuelshaner/openmc,kellyrowland/openmc,liangjg/openmc,shenqicang/openmc,keadyk/openmc_mg_prepush,shikhar413/openmc,keadyk/openmc_mg_prepush,wbinventor/openmc,mit-crpg/openmc,amandalund/openmc,amandalund/openmc,amandalund/openmc,kellyrowland/openmc,wbinventor/openmc,paulromano/openmc,johnnyliu27/openmc,shikhar413/openmc,walshjon/openmc,walshjon/openmc,lilulu/openmc,liangjg/openmc,mit-crpg/openmc,smharper/openmc,bhermanmit/openmc,bhermanmit/openmc,nhorelik/openmc,samuelshaner/openmc,walshjon/openmc,paulromano/openmc,wbinventor/openmc,liangjg/openmc,paulromano/openmc,liangjg/openmc,shikhar413/openmc,shikhar413/openmc