set_legend_args fix / cex as formal in callouts / tests for axis type 'o'

xaxs/yaxs='o' is currently broken

New release

xaxs/yaxs='o' is currently broken

Updated legend/axis/grid/style/more

Merge pull request #271 from ldecicco-USGS/master

grid, bgCol, title

pre-iterative builder refactor release

Merge pull request #227 from lindsaycarr/master

multiple callouts not broken

bug fix on last one

Merge pull request #164 from jread-usgs/master

new set_args to deal with unnamed gsplot lists args

secondary GRAN release

w/ par() and some bug fixes

initial gsplot release

basic functionality, but no logged axes