NEW FEATURE: Implement formatoption widgets

[Chilipp]

Summary

With psyplot 1.1.0, the formatoption widget framework has been introduced
that makes it possible to implement a fmt specific widget into the
formatoptions widget of the GUI. However, this is still missing for most of the
formatoptions

Reason

It makes it faster and more intuitive to handle and update the plots through
the GUI

Detailed explanation

Here is an overview over the current implementations in the LinePlotter

axiscolor	color	coord	error
erroralpha	figtitle	figtitleprops	figtitlesize
figtitleweight	grid	labelprops	labelsize
labelweight	legend	legendlabels	linewidth
marker	markersize	maskbetween	maskgeq
maskgreater	maskleq	maskless	plot
post	post_timing	sym_lims	text
ticksize	tickweight	tight	title
titleprops	titlesize	titleweight	transpose
xlabel	xlim	xrotation	xticklabels
xtickprops	xticks	ylabel	ylim
yrotation	yticklabels	ytickprops	yticks

And here the additional ones for the 2D plotter

bounds	cbar	cbarspacing	clabel
clabelprops	clabelsize	clabelweight	cmap
cticklabels	ctickprops	cticks	cticksize
ctickweight	datagrid	extend	interp_bounds
levels	miss_color

And for the vector plotter

arrowsize	arrowstyle	density

And for the density plotter

bins	density	normed	precision
xrange	yrange

Examples