Merge branch 'master' into devel
JPEG2000SignatureBox can now has simple constructor call.
Added FileTypeBox default constructor defaults.
Added default ImageHeaderBox case.
Added defaults to ColourSpecificationBox class
Added defaults for ContiguousCodestreamBox and JP2HeaderBox.
Starting on the _write method.
Success with default conversion from j2c to jp2.
Changed "tojp2" to "wrap".  Added goodstuff.j2k
Closes #63
Closes #62
Closes #61
Closes #60
Closes #59
Added XML box support.
Closes #57
Added possibility of creating XMLBox by reading an XML file.
Added two negative tests for ChannelDefinition.
Abstracted XML testing into own class.  Added more negative cdef tests.
More refactoring.