Added C++ to Travis build matrix, try #2
Added C++ to Travis build matrix, try #2

ykaliuta/cgreen,thoni56/cgreen,thoni56/cgreen,ykaliuta/cgreen,gardenia/cgreen,ykaliuta/cgreen,thoni56/cgreen,cgreen-devs/cgreen,matthargett/cgreen,gardenia/cgreen,cgreen-devs/cgreen,matthargett/cgreen,matthargett/cgreen,matthargett/cgreen,gardenia/cgreen,ykaliuta/cgreen,ykaliuta/cgreen,thoni56/cgreen,cgreen-devs/cgreen,gardenia/cgreen,matthargett/cgreen,gardenia/cgreen,cgreen-devs/cgreen,cgreen-devs/cgreen,thoni56/cgreen