add basic structure for additional features documentation

Setting the raw frame with overview, short descriptions like in code
and already revealing skill levels.

Based on the current (recently modified) structure of the feature settings.

Detailed descriptions in work and coming with later commits as well as
a dedicated admin section for that topic. Better menu integration
may be possible with Andrew's new doco structure work in progress later.

1 files changed, 67 insertions, 0 deletions

diff --git a/doc/feature/additional/composition.md b/doc/feature/additional/composition.md
new file mode 100644
index 000000000..1256f7501
--- /dev/null
+++ b/doc/feature/additional/composition.md
@@ -0,0 +1,67 @@
+## Post Composition Features
+
+
+### Large Photos
+
+Include large (1024px) photo thumbnails in posts.
+If not enabled, use small (640px) photo thumbnails
+<!-- TODO: full description for Large Photos -->
+
+Minimum required technical skill level to see this feature: 1
+
+
+### Channel Sources
+
+Automatically import channel content from other channels or feeds
+<!-- TODO: full description for Channel Sources -->
+
+Minimum required technical skill level to see this feature: 3
+
+
+### Even More Encryption
+
+Allow optional encryption of content end-to-end with a shared secret key
+<!-- TODO: full description for Even More Encryption -->
+
+Minimum required technical skill level to see this feature: 3
+
+
+### Enable Voting Tools
+
+Provide a class of post which others can vote on
+<!-- TODO: full description for Enable Voting Tools -->
+
+Minimum required technical skill level to see this feature: 3
+
+
+### Disable Comments
+
+Provide the option to disable comments for a post
+<!-- TODO: full description for Disable Comments -->
+
+Minimum required technical skill level to see this feature: 2
+
+
+### Delayed Posting
+
+Allow posts to be published at a later date
+<!-- TODO: full description for Delayed Posting -->
+
+Minimum required technical skill level to see this feature: 2
+
+
+### Content Expiration
+
+Remove posts/comments and/or private messages at a future time
+<!-- TODO: full description for Content Expiration -->
+
+Minimum required technical skill level to see this feature: 1
+
+
+### Suppress Duplicate Posts/Comments
+
+Prevent posts with identical content to be published
+with less than two minutes in between submissions.
+<!-- TODO: full description for Suppress Duplicate Posts/Comments -->
+
+Minimum required technical skill level to see this feature: 1