Case is lost when converting to internal representation

[credmond-git]

As Gestalt builds a config tree it converts all keys into lower case to maintain a consistent tree.
This works in most cases, but when extracting a map out you lose the case of the original entry.

Add a configuration to store the original casing of the properties loaded. This would be disabled by default as it adds extra memory overhead.
but when enabled, the nodes would store the original casing then when rebuilding a map file it would use the original casing instead of the normalized casing.