Updated .travis.yml
Updated .travis.yml

Added back PHP 5.3, because it still works with PHPUnit.
Also added PHP 5.5, 5.6 and HHVM.
Added explicit PHPUnit call with coverage as text.
racinmat/money,lucasmichot/money,Reservix/money,moneyphp/money,r3jack/money,mathiasverraes/money,olimsaidov/money,onedal88/money,frederikbosch/money,tttptd/money,moneyphp/money,zjsxwc/money-2,racinmat/money,racinmat/money,stiftungswo/money,josecelano/money,LostKobrakai/money,godardth/money