v0.9.0-pre22

BINDINGS/C++: Fixed tuple compilation on come old compilers
BINDINGS/C++: Rename to_load/save_options() to to_options()
BINDINGS/C++: Downgrade to C++11
CODECS: Remove unused 'properties' field from [save-features]
CODECS: Rename compression-types to compressions
COMMON: Added sail_compression_level
COMMON: Fix source_properties -> source_image.properties
COMMON: Move tuning field down
COMMON: Remove SAIL_CHROMA_SUBSAMPLING_UNSUPPORTED
COMMON: Remove SAIL_COMPRESSION_UNSUPPORTED
COMMON: Remove references to non-existing read_features.input_pixel_formats
COMMON: Rename compression levels fields like level_min -> min_level
COMMON: Rename output_pixel_formats to pixel_formats in write features [closes #165]
COMMON: Split image properties
DOC: Remove examples as outdated
DOC: Remove properties from save-features
DOC: Update bagdes
SAIL: Added CMAKE_POSITION_INDEPENDENT_CODE
SAIL: Added SAIL_INSTALL_PDB option
SAIL: Added SAIL_THREAD_SAFE compile option [closes #170]
SAIL: Advance codecs layout V6 -> V7 as we renamed codec interface functions from 'read' to 'load'
TESTS: Rename able-to-load test to can-load
TIFF: Added comment to check_c_source_runs() test
TIFF: Disable check_c_source_runs() in cross-compiling mode