More docs + docs cleanup

docs/content/index/index.yml

@@ -2,11 +2,26 @@ headline: jq
 
 blurb: |
   
-  jq is a command-line JSON processor.
+  jq is a lightweight and flexible command-line JSON processor.
   
-body: |
+body1: |
 
+  jq is like `sed` for JSON data - you can use it to slice and filter
+  and map and transform structured data with the same ease that `sed`,
+  `awk`, `grep` and friends let you play with text.
 
+body2: |
+
+  jq is written in portable C, and it has zero runtime
+  dependencies. You can download a single binary, `scp` it to a far away
+  machine, and expect it to work.
+
+body3: |
+
+  jq can mangle the data format that you have into the one that you
+  want with very little effort, and the program to do so is often
+  shorter and simpler than you'd expect.
   
+tail: |
   Go read the [tutorial](/tutorial) for more, or the [manual](/manual)
   for *way* more.