Merge pull request #3 from databasesystem/wq_branch

finish file manage
Merge pull request #4 from databasesystem/wq_branch

finish B+tree
Merge pull request #5 from databasesystem/wq_branch

you can write or read from a file by page with pageheader
Merge pull request #6 from databasesystem/wq_branch

successfully write and read the file attributes in the first page
Merge pull request #7 from databasesystem/wq_branch

Wq branch
Merge pull request #8 from databasesystem/wq_branch

insert data
Merge pull request #9 from databasesystem/wq_branch

insert data
Merge pull request #10 from databasesystem/wq_branch

whole project
insert data
Merge remote-tracking branch 'origin/master'

Conflicts:
	DBMS/DBMS.sdf
	DBMS/DBMS.v11.suo
	DBMS/DBMS/DBMS.vcxproj
	DBMS/DBMS/DBMS.vcxproj.filters
	DBMS/DBMS/DBMS.vcxproj.user
	DBMS/DBMS/Debug/DBMS.Build.CppClean.log
	DBMS/DBMS/Debug/DBMS.lastbuildstate
	DBMS/DBMS/Debug/DBMS.log
	README.md
origin files
insert data