Merge pull request #1591 from mahagr/master

Add documentation for KunenaForum classes (stubs)
#1566 Backend - User Manager: You can't logout users
Merge pull request #1593 from xillibit/k30_bugs16

#1566 Backend - User Manager: You can't logout users
Crypsis : frontend category manager publish has no effect
Merge pull request #1599 from xillibit/k30_bugs16

Crypsis : frontend category manager publish has no effect
Put back kunena.link.class.php and set deprecated
Add parameter to add additionnal CSS class on span
#1589 K 3.0 - J3.0: Restore Default Settings displays wrong text
K3.0/J3.0/J2.5 Backend: Fixed some missing button text.
Merge pull request #1604 from xillibit/k30_bugs16

Put back kunena.link.class.php and set deprecated
Merge pull request #1605 from xillibit/k30_bugs11

Add parameter to add additionnal CSS class on span
Merge pull request #1606 from xillibit/k30_bugs10

#1589 K 3.0 - J3.0: Restore Default Settings displays wrong text
Fixed #1596 K3.0/J3.0/J2.5 Backend: Fixed Report Configuration, language fixes.
Merge branch 'master' into k30-j30-j25-bugs4
Fixed #1596 K3.0/J3.0/J2.5 Backend: Small new string addition.
Merge pull request #1607 from coder4life/k30-j30-j25-bugs4

K30/J30J5 Configuration report menu fixed.  Small language fixes.
J 2.5: It is missing the language string #1597
Merge pull request #1608 from xillibit/k30_bugs16

J 2.5: It is missing the language string #1597
#1602 Crypsis - frontend category manager: Checkbox all doesn't work
Merge pull request #1609 from xillibit/k30_bugs11

#1602 Crypsis - frontend category manager: Checkbox all doesn't work