Extend Saildocs's forecast horizon to 16 days & add wave direction (FS#1220)
Wind Arrows always computed in knots to standard compliance (FS#1237)
Add Beaufort option for wind (FS#993)
Correct regression (iso_lines persistence) & initial setting
Correct rounded data display - Linux
Fix msgfmt (from gettext) warning: header field 'Language' still has the initial default value
Fix compiler warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
Add Intl Dateline correction for skew analysis when appropriate.
Merge branch 'master' of https://github.com/Ptizef/OpenCPN into Ptizef-master
Fix an assert and subsequent crash on Mac OSX with wxWidgets 3.1

  We should always use %zu for size_t printf
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN into mainline

Conflicts:
	src/chartimg.cpp