Replaced several core classes from DD with new classes to enforce
integrity checks. Rewriting everything that depended on those classes is
a massive undertaking but it should simplify our code and prevent the
many bugs we've seen lately. The rewrite isn't done yet, just committing
my progress so far.
Moved all configuration variables from mod_pocketDim to DDProperties
(formerly DimDoorsConfig). Changed property names to be clearer in
config file, modified some comments, and generally cleaned up the config
file. Fixed some missing properties and variables that were reading from
the wrong properties. Modified the order in which mod_pocketDim
instantiated some of its static fields so that they would load after
properties are read. Almost all classes load after properties are read.
Fixed indentation across various files and replaced references to
properties in mod_pocketDim with references to DDProperties.
