Members only posts on activity feed

[schlos]

Members only posts (aka "login required" posts), see #57.

Current:

• display using same rule as other posts on blog page (full post), display only to logged in users (keep current implementation)
• members only posts are not displayed on home activity feed

Expected:

• display in short form (Title and post summary) on home page activity feed only to logged in users

[schlos]

To Update (Laddr v2.3.1), members only blog posts are not listed on home page.

[themightychris]

@schlos this is intentional currently as the homepage feed is cached globally. Perhaps though there could be two caches -- one for the public and one for members