Update build.xml to reobfuscate with Searge names

Reobfuscating with Searge names (as opposed to the Obfuscated Minecraft classnames) will give the mod a pretty great chance of running on 1.6.4 even if compiled for 1.6.2, or any of the 1.6.x versions.
Updated the StirlingGenerator to accept custom contained item stacks.
Registred NEI usage recipe handlers
Update SAGMillRecipes_Core.xml

dustClay doesn't work for some people, it seems to be mod-dependent. Reverting back to vanilla itemID for clay-balls.
Merge branch 'patch-1' of https://github.com/TehSomeLuigi/EnderIO into TehSomeLuigi-patch-1
Merge branch 'patch-1' of https://github.com/WayofTime/EnderIO into WayofTime-patch-1
Merge branch 'nei2' of https://github.com/mistaqur/EnderIO into mistaqur-nei2
Merge branch 'mistaqur-nei2'
#196 Bug with adjacent liquid conduits
#293
Merge branch 'master' into 1.6.4