handle various conditions that caused zoom-around-mouse-position to fail
Avoid tests like (A*B > 0) for integer A, B because of possible overflow
Fix off-by-one error in selection string.
Allow clipboard contents to be retrieved more than once.
Define and use a sgn() function
sgn() is now defined in stdfn.h
Use defined values LAYER_* rather than magic numbers
Add a section documenting the use of layers
Merge branch 'master' into debian
define LAYER_FOREGROUND
sync Japanese documentation to gnuplot.doc 1.882
Remove distinction between "coordinate format echoed during mousing" and "coordinate format saved to clipboard"
no recursive lt definitions allowed
timecolumn(col,"timeformat") now requires a 2nd parameter containing the format
custom dashtype support for X11
add Gantt chart to demo collection
show 'fixed' property of arrow style
add dashtypes to demo collection
Some important parentheses in some macros
Bring windows pre-built config headers up to speed
Little tweaks to MinGW Makefile
update widget translations