error checks for field lengths

[yakra]

closes#56
closes#247
closes#295
closes#297
closes#298
closesyakra#120

[yakra]

Ping @fmccann -- this is what happens when I refuse to give up even 0.1s of speed:

DataProcessing/siteupdate/cplusplus/functions/split.cpp

Lines 1 to 10 in cb5270a

	inlinevoidsplit(const std::string& line, std::string* f[], size_t &s, constchar delim)
	{ size_t i = 0;
	size_t r = 0;
	for (size_t l = 0; r != -1 && i < s; l = r+1)
	{ r = line.find(delim, l);
	f[i]->assign(line, l, r-l);
	i++;
	}
	s = (r == -1) ? i : s+1;
	}