Adds a more intelligent chunk constructor

Adds a chunk constructor with full block id range, that's metadata
sensitive, has intelligent coord ordering, and which allows for
generation at greater heights than 127.
Fixes some weird formatting
Fixes ordering for z & x loops (proper array increment order)

The ordering before would skip about in the ids and metadata arrays.  This runs linearly and should improve performance.
Done live on github
Updated FML, proper free-sprite list for /gui/items.png, and fixed MCP version.
Add check that Entity saves to disk before saving entity to saved chunkloading data.

Returning false to addEntityID prevents the entity from being saved (cred to LexManos)
Entities which do not save to disk but are chunkloaders causes errors the next time the world loads. This ought to fix it.
Merge pull request #274 from iChun/patch-2

Add check that Entity saves to disk before saving entity to saved chunkloading data.
OreDictionary addition: getOreID(ItemStack)

Allow getting the oreID from a ItemStack, as an alternative from getOreID(String).

Now is easier to exchange items for their equivalencies through the OreDictionary.
Fixed issue with abandoned chunks.
Fixed random chest items not generating to there max stack sizes.
New nested configuration category support, for PR #258
Merge pull request #277 from Xhamolk/patch-1

OreDictionary addition: getOreID(ItemStack)
Added new functions to the Config class to allow for specification of comments when getting properties.
Added new getTerrainBlock whihc will limit the resuling ID to < 256, useful for world gen.
Calls to getBlock with IDs less then 256 will be assigned values above 256 {Thus freeing up terrain gen slots}
Made ConfigCategory implement Map<String, Propertery> should fix compatibility with most mods that broke two builds ago.
Fix potential NPE in saving a property that didn't define a type.
Fixed AIOOB issue with new sanity check in getBlock
Merge pull request #269 from XCompWiz/chunkcon

Adds a more intelligent chunk constructor
Small tweak to config to use Treemap
Exposed some ChunkLoader information for PR #278
Fix potential NPE in EntityJoin handler and print warning.
Added section of the EntityData NBT that will be persisted for players across respawning.
Small change to fix loading configs.