Adding more institutions from Ireland

This PR adds some more 3rd level institutions from Ireland into the library and also does some cleanup.

Specifically:
* Added the following
 * iadt.ie - Dún Laoghaire Institute of Art, Design and Technology
 * itb.ie - Institute of Technology, Blanchardstown
 * itsligo.ie - Institute of Technology, Sligo
 * ittdublin.ie - Institute of Technology, Tallaght
 * lit.ie - Limerick Institute of Technology
 * lyit.ie - Letterkenny Institute of Technology
 * ncad.ie - National College of Art and Design
* Added nuigalway.ie as UCG was renamed to NUIG in 1997. @nuigalway.ie addresses are used now, but it is possible there are still some @ucg.ie in existence.
* Added new lines to the end of all the 'ie' files that were missing them.

I'm not sure the tests I've added are very useful so I can remove them if desired. It seems the APIs are well exercised with the existing tests already.