collections: Rename collections.* to collections-*.

This is to match the convention for naming "extension" packages.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

python-stdlib/collections-defaultdict/manifest.py

@@ -2,4 +2,5 @@ metadata(version="0.3")
 
 # Originally written by Paul Sokolovsky.
 
+require("collections")
 package("collections")

python-stdlib/collections-deque/manifest.py

@@ -1,3 +1,4 @@
 metadata(version="0.1.3")
 
+require("collections")
 package("collections")

python-stdlib/collections/collections/__init__.py

@@ -1,9 +1,7 @@
-# Should be reimplemented for MicroPython
-# Reason:
-# CPython implementation brings in metaclasses and other bloat.
-# This is going to be just import-all for other modules in a namespace package
+# Replace built-in collections module.
 from ucollections import *
 
+# Provide optional dependencies (which may be installed separately).
 try:
     from .defaultdict import defaultdict
 except ImportError: