upgrade to angular4

Merge pull request #39 from doxiaodong/develop

develop -> master

Happy New Year

• add simplemde

release v4.4.4

webpack 2.2.0

release v4.4.3

1. fix a event is undefined bug
2. update manifest

release v4.4.2

rename components and directives

comonent add comp-
directive add dire-

release v4.4.1

fix async route aot

release v4.4.0

add aot compile

release v4.3.0

• add head content
• optimize music component

release v4.2.0

add music

update password encrypt

v4.1.0

change password