List strings to remap for possible constant-pool remapping

Fields only here. For CB 1.4.7, list of strings:
    https://gist.github.com/4704877
lots of collisions..
Ignore non-collisions
Constant pool string rremapping abandoned as infeasible, in favor of ldc,ldc,invokevirtual remapping

This script shows why the constant pool remapping alone won't work - too many
names collide. However, pattern matching on:

ldc (class)
ldc (string)
invokevirtual (getDeclaredField)

works great, and is the technique implemented for:

See https://github.com/MinecraftPortCentral/MCPC-Plus/issues/13
Update to CB 1.4.7-R1.1 #2629
Move CraftBukkit 1.4.5-to-1.4.6 mappings to 1.4.5/ directory

By convention, organizing the cross-version mappings by their
*lowest* version. Better this way.
Updates to remapped Spigot
Update to hotfixed MCP 7.26a mappings

This is a moderately large diff because according to http://mcp.oceanlabs.de/index.php/MCP_Releases:
"Important hotfix for MCP 7.26 released, please update with MCP 7.26a to prevent client/server mismatch issues"