Added email valiable authentication
init project of chapter2
Merge branch 'Ch-01'
Create User
Create Micropost
Finish demo app
Merge branch 'master' of https://github.com/bay6/prepare

Validate email
Resolved errors
Merge remote-tracking branch 'bay6/master'
add validation of valid email
Merge pull request #13 from diguage/master

Finish Chapter 2
:+1:
Merge pull request #17 from idanyzheng/master

chapter_1
Init Micropost Project
Merge pull request #22 from idanyzheng/master

PR
Merge remote-tracking branch 'upstream/master'
add validation of valid email
fixed
update add validation of valid email
Merge pull request #19 from chankaward/master

Add validation of valid email
Merge pull request #21 from diguage/master

Init Micropost Project