add possibility to add multiple images from attached images to gallery (slideshow)
fix default charset in few tables
remove obsolete directory/files, hybridauth is done now with auth controller
CS-4594: add posibility to load .conf files from teplate _conf directory
add posibility to manage attached images captions from edit article view
Merge branch 'WOBS-2457_in_v4.1' of https://github.com/ahilles107/Newscoop into v4.1
Merge branch 'CS-4594_conf_files_in_template_root' of https://github.com/ahilles107/Newscoop into v4.1
Merge branch 'CS-4364' of https://github.com/ahilles107/Newscoop into v4.1
CS-4437: small chnages after Holman comments

change all srings to english, and use slideshow instead gallery
Merge branch 'CS-4606' of https://github.com/ahilles107/Newscoop into v4.1
Merge branch 'CS-4437' of https://github.com/ahilles107/Newscoop into v4.1