ValidationHelper: fixed bug; pro unix time vetsi nez 32bitu
ValidationHelper: fixed bug; pro zaporny unix time, vzdy se k nemu pripocitaval time()
Tests: ValidationHelper_createDateTime_Test ignoruje bug v php <= 5.2.3

http://3v4l.org/WMbSA
Builder\Git: fixed bug; getSha ma vracet plny hash ne zkraceny (2d48f9226)