fix namespace
Merge pull request #29 from mdubey82/master

Possibly a bug in DicomTranscoder
Fix ChangeLog.md
remove need for virtual methods in DicomFile
Merge remote-tracking branch 'origin/master'
add Clear() method to DicomDataset
make DicomDirectory.Open() methods consistent with DicomFile
ensure that datasets are cleared before opening DicomDirectory
update changelog
Updated rescaled value of pixel data in DicomImage is not refelected.
Merge pull request #31 from mdubey82/PushFork

Updated rescaled value of pixel data in DicomImage is not refelected.
implement CopyTo methods on DicomDataset
test destination is not null before copying
fix bug copying tags to destination dataset
match and transform rules
update changelog
change class names and ToString() methods for clarity
remove image file
reorganize enumeration methods
null reference checking in Add() methods