Release 2.0.8 (3 May, 2019) -- compared to 2.0.7

• Fix Windows broken read of JPEG & PNG in some circumstances. #2231
• Some minor fixes to JPEG & PNG reading and file error robustness. #2187
• Fix crash reading certain old nconvert-written TIFF files. #2207
• Internals: The OIIO_DISPATCH_COMMON_TYPES2/3 macros used by many ImageBufAlgo functions have been expanded to handle a few more cases "natively" without conversion to/from float. This may make a few cases of odd data type combinations have higher precision. #2203
• ImageBufAlgo::resize() fixes precision issues for 'double' images. #2211
• Testing: A new unit test has been backported from master, which tries to perform a series of read/write tests on every file format. In partcular, this tests certain error conditions, like files not existing, or the directory not being writeable, etc. #2181
• Crashes in the command line utilities now attempt to print a stack trace to aid in debugging (but only if OIIO is built with Boost >= 1.65, because it relies on the Boost stacktrace library). #2229
• Dev goodies: fmath.h's powwroundup/pow2rounddown have been renamed ceil2/floor2 to reflect future C++ standard. The old names still work, so it's a fully back compatible change. #2199