Change interface for bundle/install

Name argument should be inferred in most cases. Also use :name
instead of :bundle-name in most places to be terser and simpler.

examples/sample-bundle/bundle/info.jdn

@@ -1,3 +1,4 @@
 @{
+  :name "sample-bundle"
   :dependencies ["sample-dep1" "sample-dep2"]
 }

examples/sample-dep1/bundle/info.jdn

@@ -1,3 +1,4 @@
 @{
+  :name "sample-dep1"
   :dependencies ["sample-dep2"]
 }

examples/sample-dep2/bundle/info.jdn

@@ -1 +1,3 @@
-@{}
+@{
+  :name "sample-dep2"
+}