[docs] Planned Features change

[alexlehm]

I'm pretty sure the feature under Site structure should say

Support for installing Ghost in a subdirectory

instead of subdomain.

I'm not sure if I can change docs on the github wiki without permission, so I though I ask before.

[alexlehm]

looks this has been implemented in 0.4, so its off the list

[ErisDS]

Sorry, I totally missed replying to / closing this issue. As per our related convo in IRC, I have no problem with people making sensible changes to the wiki. However I very much appreciated that you opened this.

Whilst I've got a stage to say this:

• destructive changes are not ok (this should be obvious)
• unhelpful changes are not ok (like adding a feature we've said we don't plan to add)
• some people changed UK spelling to US spellings, I reverted this because we are a UK company
• otherwise typos, mistakes, and useful additions are more than welcome.