Created Schematic Class

Separated part of the dungeon-exporting logic into a new class:
Schematic. Also created a few classes to implement important operations.
Some parts of the original exporting logic are missing now, such as
mapping certain blocks to standard IDs. That will be reimplemented in
the future. Importing schematics is not supported yet. I need to test
what's done so far.
Improved Schematic Class

Improved the Schematic class. Added support for reading schematic files.
That functionality still needs to be integrated and tested. Made minor
changes to WorldOperation and its derived classes. Also fixed a few bugs
in Schematic's export functions that were found during testing. The
exporting code still doesn't do all the changes (e.g. block
standardization) that had been implemented before.
Improvements to Schematic

Fixed bugs and made minor changes to Schematic. I've tested that it
works properly now. It still needs to perform additional DD-specific
functions and must be integrated to dungeon importing.
Created DungeonSchematic Class

Created DungeonSchematic, a class that extends Schematic and adds
DD-specific functionality such as methods for filtering the schematic's
block before importing and exporting. Testing confirms that
DungeonSchematic works well so far, although it still lacks critical
features.

Made some minor changes to Schematic and copied
SchematicLoader.setBlockDirectly(). I realized during testing that
setting blocks without using that function could cause problems. First,
it's possible that the blocks would not be placed if chunks weren't
created. Second, there are issues with blocks updating if we use World
to set them, even if block updates are disabled. That causes some
torches to break and other weird problems.

Added classes to support block filtering operations applied to
Schematic. These are used to implement ID standardization and removing
mod blocks when importing.
Improved and Integrated DungeonSchematic

Improved DungeonSchematic to the point that it can replace
SchematicLoader as our method of loading dungeons. Some of the code was
copied over rather than refactored to save time. It's been subdivided so
make it much more readable. Also, we can reimplement portions of it as
WorldOperations later on further remove redudancy. Testing shows that
there is one problem left to fix: door blocks are not being set up
correctly at the moment. Rifts are being set up properly and attaching
doors to rifts will show that dungeons continue to generate fine.

Added classes to support DungeonSchematic and its additional filtering
logic on import and export. SpecialBlockFinder handles listing the
entrance, other doors in the dungeon, and end portal frames.
FillContainersOperation is a WorldOperation that fills chests and
dispensers. BlockRotator is a temporary class to hold
transformMetadata() and transformPoint() until we rewrite that code
later.

Stripped out most of the code from SchematicLoader to ensure it's no
longer used. The only remaining function sets up dungeon pockets. We can
phase it out in a later version so as not to delay our release. Removed
references to SchematicLoader in mod_pocketDim since it no longer needs
to be instantiated.
Fixed Door Bugs

Fixed the bugs that caused doors not to appear right in dungeons. First
there was a bug with filters that caused them not to replace blocks
properly. I made some changes to SchematicFilter and its derived classes
so that the implementations are a little more intuitive. That should
prevent those bugs in any future derived classes. Then doors wouldn't
rotate properly. DD was never designed to rotate dimensional doors. I
added code to BlockRotator for that and shifted some code from
DungeonHelper to BlockRotator. More coherence, less coupling!
Merged Upstream Changes
Minor Change

Made a minor change to DungeonSchematic so that it replaces foreign mod
blocks with the standardized FoR ID on export. Previously it used the
Forge-assigned ID, but since that happens after ID standardization, it
could cause us to export non-standard IDs.
Merge pull request #56 from SenseiKiwi/master

Overhauled Schematic Importing and Exporting