Util: add DateTime and Hadoop helpers

plus add stuff on Project
inconsistency between function name (``getIntAsString``) and argument name (``dayOrMonth``).
also, if what you're doing is printing int to given length there's a simpler way using format strings and format string interpolator: http://stackoverflow.com/questions/8131291/how-to-convert-an-int-to-a-string-of-a-given-length-with-leading-zeros-to-align