FileCloseAction

Moved the FileCloseAction enum to a separate file so it can be used with
other kinds of file wrappers more easily.
FileWrapper Updates

Fixed a few minor bugs and added a few functions. The FileWrapper class
is close to being finalized, at which point it will go through thorough
testing of all its functions.
NumericFile Added

Added the NumericFile class, which is a wrapper for numeric I/O. The
class is still in development, but it is already quite functional. It is
quite likely that there are a few bugs present at the moment; these will
be fixed as soon as they are found. This class will most likely have all
of the functionality of the FileWrapper class, plus some additional
convenience functions specific to numeric data processing.
ReadMe Update

Cleared the read-me, as it needs to be revised to reflect the recent
changes that were made to the project. This will happen soon, but it is
not a high priority task.