一个开源的每日构建工具R2build，非常适合项目的每日构建，例如VC，.net ,java,borland系列的项目。
http://r2build.wiki.sourceforge.net/
R2build 1.0 RC1 Published for Beta Test (Continuous Integration/Daily Build Tool)
Extend R2build: add new tool support, create plugin config
