refactor app.coffee
update core locale
Merge pull request #92 from lyd600lty/develop

update core locale
account model
test coverage report
change to mongoose schema
Plugins-Guide
fix typo in Plugins-Guide.md
model enum pluggable
tests about app.coffee
more test
csrf middleware
web api test helper
test of account pages
test of utils.rx
finish test of utils
refactor models
utils.pickErrorName
some validators of account model
test of Account.register