Log Message:
Update gnuplot to 5.0.2

NEW support "set clip {one|two}" in 3D vector plots (splot ... with \ 
vectors)
CHANGE post.trm treats lt -1 as double width only when drawing the plot border
CHANGE distinguish between empty string variable and string constant ""
CHANGE preserve full precision of samples generated by '+' or '++'
CHANGE dumb terminal now handles UTF-8 characters
CHANGE "plot for [i=1:n] foo=i, x*foo" generates n plots (comma is ignored)
CHANGE accept '\r' as a terminator after console prompt (Windows only)
CHANGE use the same arrowhead style in the key sample as in the plot itself
CHANGE the command "set tics {front|back}" no longer affects grid \ 
lines also
CHANGE allow "noautoscale" keyword for 2D function plots
FIX dashtype labels in 'test' command were off by one
FIX autocalculation of box widths in the presence of NaN data values
FIX qt terminals dots were invisible
FIX point and impulse colors in 3D binary plots
FIX enable dashtype processing for epslatex terminal
FIX clean handling of unexpected input commands or data found by fuzz-testing
FIX many places where corrupt input commands or data could trigger a crash
FIX aquaterm fill area with transparency
FIX "offset 0" means "no offset" even in the case of \ 
log-scaled axes
FIX handle formatted read from a datablock
FIX "pause mouse" for wxt terminal (OSX, other single-threaded platforms)
FIX 2-column data plots "with filledcurve y=<value>"
FIX handling outliers in boxplot with categories (i.e. level in column 4)
FIX inline input format in `splot` command
FIX order-dependence of optional keywords for "set key" and "set \ 
obj polygon"
FIX lua/tikz text placement errors on OSX 10.10.2 with lua5.3
FIX B and L formats in gprintf()
FIX bug parsing time input with format "%s" (extra fractional second)
FIX incorrect average value in final bin of "smooth cnorm" calculation
FIX handle log-scale y values when calculating monotonic cubic spline fit
FIX "set clip points" was non-functional in version 5.0
FIX regression in 5.0.1 that left extraneous '@' in title columnhead(N)
FIX vertical placement of text fragments by cairo terminals
FIX "set [*]axis rangelimited" applies to minor as well as major tics
FIX qt terminal could drop chars from stdin depending on external event timing