IQ-TREE version 1.5.2

This version improves software stability. We thank all users (mentioned below) for the reports.

Bug fixes:

• Incorrect likelihood computation under safe mode for rate homogeneity models (thanks to Ricardo Alves).
• Bug when finally merging partitions (-m TESTMERGE) (reported by Olivier Navaud).
• Crash when computing distance with consensus tree in presence of identical sequences (-bb option) (reported by Julien).
• Crash for I+G model when p-invar close to 0 (reported by liqiangj, Frank Wright).
• Bug likelihood scaling for ASC model (reported by lgrismer).
• Uninitialized parsimony kernel (reported by ev.simonov).

Other changes:

• Fix misleading message about multifurcating trees (reported by Noah Simons).
• Incompatibility problem with older Mac by switching back to libstdc++ instead of libc++ (reported by Matthew Fullmer).
• Fix compilation issue for BSD and newer GCC 5.4 (thanks to @njoly).
• Improved -nt AUTO option, e.g. to work with model selection (reported by Remi Denise).