CSHARP-5554: Improved ObjectId parsing and ToString() performance#257

Open

pieceofsummer wants to merge 2 commits intomongodb:mainfrom pieceofsummer:objectid-performance

Commits on Oct 23, 2016

Improved ObjectId parsing and ToString() performance
pieceofsummer
committed
Fix culture-related issue in Decimal128 test, which refused to pass
pieceofsummer
committed