Tracer v1.7.2

New release of Tracer. See http://beast.community/tracer for more details.

Tracer.v1.7.2.dmg --- Mac OS X version
Tracer.v1.7.2.zip --- Windows version
Tracer_v1.7.2.tgz --- Linux/UNIX version

v1.7.2 Bug fixes:

• Compile at Java 1.8 in Ant.
• Unable to run trace.jar with the error message "no main manifest attribute".
• Fix Trace panel for selecting multiple log files.
• Fix a bug that continuous density has negative axis.
• Replaced Quaqua Mac look-and-feel with VAqua.
• Mac notarizition.
• Preserve bin/tracer permission after compressed.