DICOM: fix file grouping so that path names are normalized

On Windows in particular, the list of pattern files often has extra path separator escaping, which prevents the
pattern files from being matched with the files from the directory listing.
Add the series index to the default image name

This prevents confusion when importing multi-series datasets that do not
override the image name.
Only add a MetadataOnly element if no TiffData elements are present

This prevents validation errors for most OME-TIFF files; noticed by @qidane.
Update auto-generated documentation

Repository: openmicroscopy/bioformats
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Generated by BIOFORMATS-5.0-latest-docs-autogen#197 (http://ci.openmicroscopy.org/job/BIOFORMATS-5.0-latest-docs-autogen/197/)
Merge pull request #1024 from melissalinkert/dicom-file-grouping

DICOM: fix file grouping so that path names are normalized
Merge pull request #1033 from melissalinkert/sdt-image-name

Add the series index to the default image name
Merge pull request #1040 from melissalinkert/rebased/dev_5_0/metadataonly

Only add a MetadataOnly element if no TiffData elements are present (rebased onto dev_5_0)
Merge pull request #1047 from snoopycrimecop/autogen/dev_5_0/latest

Update auto-generated documentation