void setIndex(string, int); //sequencename, index
int getIndex(string); //returns vector index of sequence
bool isValidGroup(string); //return true if string is a valid group
+ void removeSeq(string); //removes a sequence, this is to accomadate trees that do not contain all the seqs in your groupfile
string getGroup(string);
vector<string> namesOfGroups;
vector<string> namesOfSeqs;