REL: set version to 1.5.0rc1, released=True.

diff --git a/setup.py b/setup.py
index 4a5f5b5..07164cf 100755
--- a/setup.py
+++ b/setup.py

@@ -56,8 +56,8 @@
 MAJOR               = 1
 MINOR               = 5
 MICRO               = 0
-ISRELEASED          = False
-VERSION             = '%d.%d.%db2' % (MAJOR, MINOR, MICRO)
+ISRELEASED          = True
+VERSION             = '%d.%d.%drc1' % (MAJOR, MINOR, MICRO)
 
 # Return the svn version as a string, raise a ValueError otherwise
 def svn_version():