Add script to identify non-obf/obf names in MCP/CB

Results on CB 1.5-R0.1 vs Forge 7.7.0.584: https://gist.github.com/agaricusb/5174962 (103)
Update prerenamefixes and uncollide mappings for official CB 1.5

Working MCP-remapped source at https://github.com/agaricusb/CraftBukkit/tree/pkgmcp
Test build https://bitbucket.org/agaricusb/craftbukkit/downloads/craftbukkit-1.5-R0.1-SNAPSHOT-2646-pkgmcp.jar