updating guava dependency version to 18.0, fixes #189
updating guava dependency version to 18.0, fixes #189

sbliven/biojava-sbliven,andreasprlic/biojava,JolantaWojcik/biojavaOwn,emckee2006/biojava,andreasprlic/biojava,paolopavan/biojava,andreasprlic/biojava,sbliven/biojava-sbliven,heuermh/biojava,pwrose/biojava,andreasprlic/biojava,lafita/biojava,sbliven/biojava-sbliven,pwrose/biojava,fionakim/biojava,JolantaWojcik/biojavaOwn,fionakim/biojava,emckee2006/biojava,zachcp/biojava,lafita/biojava,lafita/biojava,zachcp/biojava,biojava/biojava,emckee2006/biojava,fionakim/biojava,heuermh/biojava,pwrose/biojava,paolopavan/biojava,heuermh/biojava,biojava/biojava,biojava/biojava,zachcp/biojava,paolopavan/biojava