Add CB 1.4.6 <-> FML/MCP 1.4.7 mappings

Used for porting CB 1.4.6-R0.4, the first dev build which MCPC (and
therefore MCPC+) was based on, to FML/MCP 1.4.7. May seem strange to
have this cross-version merge but it is what we have in current builds
(CB 1.4.6-R0.4 + Forge 1.4.7); this mapping is in preparation for CB 1.4.7.
Update remap-craftbukkit script for 1.4.6-R0.4

This is a starting point for the CB build MCPC+ was based on
git format-patch?
Switch to git diff to generate mapped patches

Will have to prepend the git format-patch / am header afterwards.
Rename
Prompt to wait for IDEA to quiesce before continuing
mappatch: generate initial remapping from a base commit
Write remapped patch
Loop until IDEA is closed
Incremental patch remapping functional
mappatch: fix paths
mappatch: fix rewriting - now usable with 'git am'