Add system's configurations editor

Add a new system’s configurations editor under Admin account menu and
add configuration for EOL’s logo
Remove javascript ellipsis

Remove javascript ellipsis from settings table. Now using CSS3 overflow
ellipsis
Update help

Update help
CKEditor fixes and updates

CKEditor maximize fix and plain text paste
Fileman update

Remove not used button in Fileman browser
Update getScoreFromGivenAnswer

Move getScoreFromGivenAnswer from Answers class to Questions class