avoiding unecessary formatting.

Conflicts:
	mpl_fig.py

This is done to prevent confusion when using the server/client interface.

format to allow a better merging of data with client.merge_data query
issue is that a MplData object is created on the server side silently...
so the user need to be warned.

client-sice >: fig.update(rawdata=['some_data'])

now should work.

print_options changed in numpy and do not accept a string
like 'nan' as an argument. Was throwing an error. I commented the
line.

Made a mistake in the axes factory. the server constructor was set to
pass but it needs to update the possible keywords.

add the following line:
self.update(**kwargs)

Resolve "FEATURE: adding method dynamically to a given instance"

See merge request !62

declare aliases or addAxes (which make less sence but what ever...)

tested (by hand -- no unittest and no tutorial) and pass

MyWin_TkAgg.py. Now it also work with mpl 2.0.0. 

Tests and tutorials are passing but clearly need some cleaning...

it needs cleaning though and this is not compatible with python3

tests and tuto should pass