add test data in migrate script
update api methods & models
update api & comments model
update api & posts model
update api & users model
Merge branch 'master' into aleks_work_on_api

Conflicts:
	src/main/java/ru/yandex/school/hlebushek/api/GetData.java
	src/main/java/ru/yandex/school/hlebushek/models/Comments.java
merge master && small refactoring
logo in readme align by center
add line in readme
Merge pull request #9 from autoschool/aleks_work_on_api

api and models update