sqlite3@2.2.0

Updates node-sqlite3 to v2.2.0

This version is compatible with 2.1.x but includes:

 - updated internal libsqlite3 from 3.7.17 -> 3.8.2 (http://www.sqlite.org/news.html) which includes the next-generation query planner http://www.sqlite.org/queryplanner-ng.html
 - improved binary deploy system using https://github.com/springmeyer/node-pre-gyp
 - binary install now supports http proxies
 - source compile now supports freebsd
 - fixed support for node-webkit
 - binaries are available: http://node-sqlite3.s3.amazonaws.com/index.html?path=Release/

Because of the update of the internally bundled libsqlite3 version this should be tested before going into production.