updating guava dependency version to 15.0
updating guava dependency version to 15.0

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