Added support for recently approved CPs.

Added support for CP-1203, CP-1331, CP-1343 and CP-1347 to the data
dictionary.
Updated comment based on CP-1335.

Updated comment on not yet supported Frame of Reference IE / Synchronization
Module that is conditional/optional for some SR IODs (based on CP-1335).
Added support for new Colon CAD SR constraints.

Added new "TCOORD selected from" line to the Colon CAD SR constraint checker
from Table A.35.10-2 (Relationship Content Constraints for Colon CAD SR IOD)
introduced with the recently approved CP-1335.
Fixed various typos and minor Doxygen issues.
Updated data dictionary for DICOM 2014a edition.

Updated data dictionary for the latest edition of the DICOM standard, which
has been released on 2014-06-30. Since the data dictionary was already
up-to-date regarding the recently approved Supplements and CPs, there should
be no changes apart from the name of the underlying DICOM standard.