Add missing release notes

A number of user-facing improvements and fixes have merged since the
most recent release without release notes, so attempt to summarize
them accurately in preparation for an upcoming release.

Change-Id: I387cc4c5544f685f9d59f663734b44f3987cb1d5

releasenotes/notes/apk-error-handling-94d6910226a770f2.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Improved parsing of warning and error output from the ``apk`` tool in
+    alpine.

releasenotes/notes/as-module-b07f9bf5c220d3e5.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Bindep can now be imported as a Python module, useful when making plugins
+    for other Python-based tools or experimenting in the REPL.

releasenotes/notes/oraclelinux-support-67e7629a65116504.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Basic support for Oracle Linux is now included.

releasenotes/notes/pacman-512-brief-c97003ce11a5be90.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Now handles parsing pacman 1.5.2 and later output so --brief works on newer
+    releases of Archlinux.

releasenotes/notes/pacman-shadowing-file-61abbec4a717c8c2.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    If a local file has the same name as a package, this no longer confuses parsing of pacman output on Arch Linux.

releasenotes/notes/platform-basepy-95b8884db5a934b4.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    A new set of virtual platform profiles, ``platform:base-py2`` and
+    ``platform:base-py3`` can be used to differentiate packages on Debian
+    derivatives (including Ubuntu), Red Hat derivatives (including CentOS and
+    Fedora), and MacOS X/Darwin.

releasenotes/notes/rpm-path-reference-34012951fcbcb339.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    For improved flexibility, any rpm package can be referred to by the full
+    path to an executable they provide, in lieu of their actual package name.