KeyRange fixes: - correcting maximum possible key to be 2**63-1 - better handling if mixing ids & names in split functions - using found key as a basis for binary search for faster convergence
KeyRange fixes:
- correcting maximum possible key to be 2**63-1
- better handling if mixing ids & names in split functions
- using found key as a basis for binary search for faster convergence


git-svn-id: 120402244b5714bfc5c7f1741d57d585f71ae04f@103 441dd3cb-e453-d85f-364a-b28e0c74875c

mikea/appengine-mapreduce,mikea/appengine-mapreduce,OsoTech/appengine-mapreduce,johnwlockwood/appengine-mapreduce,mikea/appengine-mapreduce,OsoTech/appengine-mapreduce,johnwlockwood/appengine-mapreduce,OsoTech/appengine-mapreduce,johnwlockwood/appengine-mapreduce,mikea/appengine-mapreduce,OsoTech/appengine-mapreduce,johnwlockwood/appengine-mapreduce