adapter adds methods : add, remove

i think i need imp remove sqlstringbuilder
modify ienumerable
add NLAdapter Test Case in SQLite.Test
modify test case
modify adapter

there is a bug here, foreach method won't add script to multiscripts
fields. cause it's use getenumerator.
Merge branch 'Adapter' of https://github.com/kkchuchu/NLORM into develop
add bit, decimal type, and test cases