Merge pull request #3 from owensss/master

continues remove files - -
condition updated
Merge branch 'master' of https://github.com/zpzjzj/miniSQL
reslove conflict

Conflicts:
	miniSQL/BufferManagerTest/Debug/test.pch
	miniSQL/Debug/miniSQL.lib
	miniSQL/miniSQL.sdf
	miniSQL/miniSQL.v11.suo
	miniSQL/miniSQL/Debug/BufferManager.obj
	miniSQL/miniSQL/Debug/CL.read.1.tlog
	miniSQL/miniSQL/Debug/CatalogManager.obj
	miniSQL/miniSQL/Debug/Lib-link.read.1.tlog
	miniSQL/miniSQL/Debug/RecordManager.obj
	miniSQL/miniSQL/Debug/fileOperation.obj
	miniSQL/miniSQL/Debug/miniSQL.Build.CppClean.log
	miniSQL/miniSQL/Debug/miniSQL.log
	miniSQL/miniSQL/Debug/vc110.idb
	miniSQL/miniSQL/Debug/vc110.pdb
working version. with bug, a fix on NULL_OFFSET