readded TreeParserTest, this was a mistaken removal caused by an earlier mistaken removal of PhylogeneticTree.java
readded TreeParserTest, this was a mistaken removal caused by an earlier mistaken removal of PhylogeneticTree.java

ProgrammingLife2016/PL5-2016,ProgrammingLife2016/PL5-2016,ProgrammingLife2016/PL5-2016