Merge pull request #26 from jeduan/master

Updates bcrypt version
update npm keywords
add node v0.8 and v0.10 to .travis.yml
update mocha to v1.8.2
update mongoose to v3.5.8
change run to exec
change fields to an object, http://mongoosejs.com/docs/api.html#query_Query-select
v0.0.8
update readme
dont try to test v0.10
add services to travis.yml
Compatible with mongoose 3.6