Merge branch 't6_ajax-datepicker'
ticket:6 fix bug with saving and retriving data
tickect:8 implement test
Merge branch 't8_tag'
tocket:8 implement template tag
Merge branch 't8_tag'
ticket:9 implement manage.py command and bash script
reset commit
Merge branch 't9_command'
refactoring
refactoring
refactoring
edit test test_save
refactoring
refactoring
refactoring
Merge branch 'master' into t10_signal
ticket:10 implement test
Merge branch 't10_signal'
ticket:10 implement signals callback functions