Compilation issues: older versions of boost

[ustramooner]

The following code doesn't work with boost versions prior to 1.38:

boost::gregorian::date date = parser.parse_date(paddedDate.c_str(), dateFormat->c_str(), svp);

if 1.38 was supported, there would be a lot more platforms that would work out-of-the-box

[synhershko]

I wouldn't push for boost 1.38 compatibility, unless there's very few places like this where we can replace boost with reliable code (which may be consequently lighter).