Bump SDK version number to 1.3.7
Bump SDK version number to 1.3.7

git-svn-id: 126d714f35e1e20f248b8971ffc791fb0bebcf45@107 441dd3cb-e453-d85f-364a-b28e0c74875c

mikea/appengine-mapreduce,mikea/appengine-mapreduce,mikea/appengine-mapreduce,mikea/appengine-mapreduce