Add release notes for version 3.2.0a1

diff --git a/SALOME3_2_0alpha1_Release_notes.pdf b/SALOME3_2_0alpha1_Release_notes.pdf
new file mode 100755 (executable)
index 0000000..be003a7
Binary files /dev/null and b/SALOME3_2_0alpha1_Release_notes.pdf differ