port rev. 2875: Issue 1764 bit reverse speedup (another back-back-port ;)
port rev. 2875:
Issue 1764 bit reverse speedup
(another back-back-port ;)

git-tfs-id: [https://tfs.codeplex.com/tfs/TFS05/]$/ZXingNet/trunk;C87134

micjahn/ZXing.Net,DHMechatronicAG/ZXing.Net,DHMechatronicAG/ZXing.Net,bsoja/ZXing.Net,DHMechatronicAG/ZXing.Net,micjahn/ZXing.Net,bsoja/ZXing.Net,micjahn/ZXing.Net,bsoja/ZXing.Net