Update draft release notes to 2.0

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/2.0.0.txt

@@ -47,6 +47,14 @@ Updates since v1.9 series
 
 UI, Workflows & Features
 
+ * The "rev-parse --parseopt" mechanism used by scripted Porcelains to
+   parse command line options and to give help text learned to take
+   the argv-help (the placeholder string for an option parameter,
+   e.g. "key-id" in "--gpg-sign=<key-id>").
+
+ * The pattern to find where the function begins in C/C++ used in
+   "diff" and "grep -p" have been updated to help C++ source better.
+
  * "git rebase" learned to interpret a lone "-" as "@{-1}", the
    branch that we were previously on.
 
@@ -158,6 +166,11 @@ Unless otherwise noted, all the fixes since v1.9 in the maintenance
 track are contained in this release (see the maintenance releases'
 notes for details).
 
+ * "git status --porcelain --branch" showed its output with labels
+   "ahead/behind/gone" translated to the user's locale.
+   (merge 7a76c28 mm/status-porcelain-format-i18n-fix later to maint).
+
+
  * "git repack" died when asked to (re)pack with the reachability
    bitmap when a bitmap cannot be built; instead, just (re)pack
    without producing a bitmap in such a case, with a warning.