add beginnings for sqlite dialect
add error message for renaming column
Merge branch 'master' of github.com:brianc/node-sql
base sqlite on postgres, instead of mysql. throw errors for unsupported features.
sqlite dialect and all sqlite tests. subqueries can now have their columns selected as tables
SQLite cannot add more than one column per alter table statement. Call sqlite tests.
change test case to give a varied sub post request with and without AS
Merge branch 'master' of github.com:brianc/node-sql into add_sqlite

Conflicts:
	test/dialects/order-tests.js
Merge pull request #45 from HughePaul/master

Add sqlite support, make subqueries be real subqueries