Bump the version number to 0.8.8.

Changes since 0.8.7:
- Update dictionary for DICOM 2018d.
- Improve dicomtonifti options for time handling.
- Improve printing scientific notation (remove unneeded decimal).

Bug fixes since 0.8.7:
- Fix potential crash in vtkDICOMDirectory and command-line tools.
- Fix compilation with dcmtk in absence of charls library.
- Fix multiple UID matching for dicomtocsv.

CMakeLists.txt

@@ -19,7 +19,7 @@ include(CTest)
 # Project version
 set(DICOM_MAJOR_VERSION 0)
 set(DICOM_MINOR_VERSION 8)
-set(DICOM_PATCH_VERSION 7)
+set(DICOM_PATCH_VERSION 8)
 set(DICOM_SHORT_VERSION "${DICOM_MAJOR_VERSION}.${DICOM_MINOR_VERSION}")
 set(DICOM_VERSION "${DICOM_SHORT_VERSION}.${DICOM_PATCH_VERSION}")