cpp: test: Only test multi_array assertions for release builds

Strict bounds checks are only compiled in when NDEBUG is not
defined.
cpp: FormatWriter: Drop unused variable 'planes'
cpp: tiff: Add INDEXED tag
cpp: tiff: IFD provides PhotometricInterpretation accessors
cpp: CoreMetadata default falseColor to true

This is to match the Java implementation.
cpp: Correct CoreMetadata docstrings
cmake: TIFF and PNG libraries are required
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 1373 (cpp: test: Only test multi_array assertions for release builds)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 1374 (C++: Collected small fixes)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only

Repository: openmicroscopy/bioformats
Excluded PRs:
  # PR 1309 melissalinkert 'Allow tile-based access of large JPEG-2000 images' (exclude comment)
  # PR 1365 ctrueden 'PrairieView 5.2 fixes and improvements' (label: exclude)
  # PR 858 melissalinkert 'Initial support for Veeco AFM data' (label: exclude)
  # PR 1015 qidane 'Messy binary' (exclude comment)
  # PR 1177 rleigh-dundee 'specification: Add metadata for HDF5 embedding' (exclude comment)
  # PR 1265 qidane 'New units' (label: breaking)
  # PR 1366 ctrueden 'Miscellaneous cleanup' (label: exclude)
  # PR 857 melissalinkert 'Initial support for Zeiss .lms files' (label: exclude)
  # PR 1362 melissalinkert 'Make FormatReader's RandomAccessInputStream transient' (label: breaking)
  # PR 1161 sommerc 'Initial CellH5 Reader class' (user: sommerc)
Updating b551e04..8560031
Previously merged:
  # PR 1369 sbesson 'Document usage of setSeries() and getIndex() in MATLAB documentation'
  # PR 1371 rleigh-dundee 'C++: Read and write all pixel types and validate all tags and pixel data'

Merged PRs:
  # PR 1373 rleigh-dundee 'cpp: test: Only test multi_array assertions for release builds'
  # PR 1374 rleigh-dundee 'C++: Collected small fixes'

Generated by OME-5.1-merge-push#519 (http://ci.openmicroscopy.org/job/OME-5.1-merge-push/519/)