Document new features in 1.1.6.4

[DarTar]

(subticket of #587)

New features introduced in 1.1.6.4 that need to be  documented:

• User administration module #25
• Page administration module #26
• Database Info action #27
• WikkaEdit (maybe add a feature list?) #578
• user registration (a tutorial would be very useful!) #609
• Header and Footer moved to template folder (added in WhatsNew) #146
• New highscores action #688
• Removed support for invalid color names in {{color}} action [861]-[862]
• Basic support for numbered revisions (added in WhatsNew) #650 [905]-[906]
• Some  missing pages to be checked against the list of actions included in 1.1.6.4 (done)
• How-to for intranet actions #625
• New stylesheet - a tutorial on migrating custom styles from 1.1.6.3 to 1.1.6.4 would be useful. (added in release notes)

(please update this page everytime a new feature that needs to be documented is introduced)

[DarTar]

adding further items to be documented

[DarTar]

A lot of pages still refer to old versions, they should be either updated to match 1.1.6.4 or tagged with the since/until labels if they refer to obsolete docs.

 1.1.6.0  1.1.6.1  1.1.6.2  1.1.6.3

[DarTar]

added note on stylesheet changes

[DarTar]

adding todo for user registration

[DarTar]

adding highscores action

[DarTar]

Marking a few items as done and adding some notes

[DarTar]

updating list

[DarTar]

added basic documentation on  iframe action