More dos2unix

Consider setting a git configuration to manage line-endings, like:
  https://help.github.com/articles/dealing-with-line-endings#platform-windows
Normalize formatting (replace tabs) and extend AbstractBackend
Merge branch 'mmilton_master' of github.com:atz/vufind into mmilton_master

Conflicts:
	config/vufind/EDS.ini