Merge pull request #18 from jaumeortola/master

Add test for avoiding mixed-case suggestions
fix github bug #19

also remove inefficient lowercasing and uppercasing where possible
Merge branch 'master' of https://github.com/morfologik/morfologik-stemming
stop unnecessary lowercasing and offer suggestions only for words > 3 characters long
Improve performance in pair-replacements. Fix bug in isNotCapitalized