Fix some spelling errors
Further development of R tests comments.
Ignore *.backup
Merge branch 'master' of github.com:Paulie14/ESCOarticle_xfem

Conflicts:
	2014_ESCO_article/esco_article.tex
Finish comments on enrichment radius test.
Merge branch 'master' of github.com:Paulie14/ESCOarticle_xfem

Conflicts:
	2014_ESCO_article/esco_article.tex