1. cvswrappers文件：
refers to
http://www.mobilefish.com/developer/cvsnt/cvsnt.html
Before using CVS， it is recommended to update the cvswrappers file. The cvswrapper file contains file extensions which determines which file should be stored as binary files in the CVS Repository. To update this file do the following:
Add the following file extensions in the cvswrappers file， e.g.:
*.cab -k 'b'
*.class -k 'b’
*.doc -k 'b'
*.dll -k 'b'
*.ear -k 'b'
*.exe -k 'b'
*.exp -k 'b'
*.fla -k 'b'
*.gif -k 'b'
*.gz -k 'b'
*.jar -k 'b'
*.jpg -k 'b'
*.jpeg -k 'b'
*.lib -k 'b'
*.msi -k 'b'
*.mso -k 'b'
*.pdf -k 'b'
*.pfw -k 'b'
*.png -k 'b'
*.ppt -k 'b'
*.sit -k 'b'
*.swf -k 'b'
*.tar -k 'b'
*.tlb -k 'b'
*.vsd -k 'b'
*.xls -k 'b'
*.war -k 'b'
*.wmz -k 'b'
*.zip -k 'b'
