-- update the computations of variance and standard deviation to avoid negative numbers (per discussion with Alexandre Maurel)

git-svn-id: https://codeforge.lbl.gov/anonscm/fastbit/trunk@623 9ec3b2dc-5744-0410-9993-b8723341f1db
-- remove the restriction on fileManager::maxBytes based on ULONG_MAX

git-svn-id: https://codeforge.lbl.gov/anonscm/fastbit/trunk@624 9ec3b2dc-5744-0410-9993-b8723341f1db
-- add ibis::text::readStrings to handle the case where .sp file can not be loaded into memory as a single unit

git-svn-id: https://codeforge.lbl.gov/anonscm/fastbit/trunk@625 9ec3b2dc-5744-0410-9993-b8723341f1db