git log -p -m: document -m and honor --first-parent

diff --git a/RelNotes b/RelNotes
index d57124075c1451ae51eb17935669a4cedff4c605..7b9bde663bd5b2b8eec6b7e91c1de275f6afa460 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.6.6.1.txt
\ No newline at end of file
+Documentation/RelNotes-1.7.0.txt
\ No newline at end of file