Update version back to +svn.
Note: to show that svn is current version plus current developements, the dash (-) has been replaced with a plus (+).
Thus, now that 0.1.0 has been released, we're preparing the next version, that is 0.1.0 plus svn developments, thus 0.1.0+svn

     1.1 --- a/version	Sun Jul 01 21:22:23 2007 +0000
     1.2 +++ b/version	Sun Jul 01 21:25:03 2007 +0000
     1.3 @@ -1,1 +1,1 @@
     1.4 -0.1.0
     1.5 +0.1.0+svn