In progress: closeDB, createDB, create

- Need to fix several todos
Merge branch 'dheeraj' into nithin

Conflicts:
	include/error.h
Implemented insert

- Added/moved several helpers
- Fixed createdb
- Create is incomplete
Implemented create and fixed insert

- Need to check the fismes and todos
- Several minor fixes
Merge branch 'nithin' into dheeraj

Conflicts:
	include/defs.h
	include/error.h
	include/globals.h
	physical/createcats.c
	physical/error.c
	physical/helpers.c
	schema/closedb.c
	schema/create.c
	schema/createdb.c
select, delete, quit implemented.
join is partially done