add “缺省值”
delete .settings
add build system and change environment variable.
add third party package.
add mysql connection pool and libeasy rpm to thirdparty.
add O0 compile optimization.
blocked in connection 2.
blocked in connection 2, and we need sovle the simple return result.
conf相对路径问题.
rename the binary executed file.
Merge remote branch 'yukai-0708/master' into alpha

Conflicts:
	Config.cpp
a bug about run two times.
delete the settings.
yukai modify.
Merge remote branch '0714/alpha' into alpha

Conflicts:
	Config.cpp
	common/ExpressionItem.cpp
before test the distributed version.
change the dir.
add get environment variable from CLAIMS_HOME.
bug in environment.
yukai solve the bug.