Merge pull request #6 from ahilles107/master

fix name of article screen hook event
Adds GPLv3 license file.
example plugin corrections
Merge pull request #8 from takeit/master

example plugin corrections
Lifecycle Subscriber bug fix
Merge pull request #9 from takeit/master

Lifecycle Subscriber bug fix
Merge pull request #7 from hlmnrmr/master

Adds GPLv3 license file.
improvements for plugins installer v0.2
Merge pull request #10 from takeit/master

improvements for plugins installer v0.2
Added translation system
translation fix
Merge pull request #11 from takeit/master

Configured translation system
add custom template list