Resolve "FEATURE: add FormatterDictToLines in mpl_toolbox"

Closes #106

See merge request !79

   - FormatterDictToLines formats a dictionary into data for Ax2dPlots.
   - contains tests and tutorials

Add the git version (last tag) in setup.py

See merge request !78

modify README.md

Resolve "[Feature] switching context after importing"

Closes #100

See merge request !77

     - set AUTO_CONTEXTUALIZE to False in config.json
     - call myplotlib.mpl_contextualize(context)

This can be useful while designing remote figures preventing
always to reload mpl module after modifying config file.

Resolve "MODIF: load config dynamically"

Closes #107

See merge request !75

       from json file. ``config.json``. json format was choosen
       because it is part of default python distribution and does
       not require extra dependancy. Alternative could YAML but
       requires PyYAML.

mid-mergeing for further developpment new base branch

See merge request !73

added a tutorial for it (tuto006.py)
no tests.

new test suite.

    to clarify the fact that set_rawdata is not part of the public API. use `update(rawdata=...)` instead.

Resolve "[BUG] in client context the status of format_rawdata is alway True event when failed"

See merge request !72

in mpl_client.sync_fig_format_rawdata(): if server returns an error datas is set to None and error message is printed
in mpl_fig._format_rawdata_client(): if datas returned from the client is None then return False.

Resolve "[Bug] transmitting error message back to client fails"

Closes #102

See merge request !71

Resolve "[Bug] transmitting error message back to client fails"

See merge request !70

                  cast all e.args to string where printted.

                                             add a WARNING in case the Error message
                                                 has a <success Flag> (Status.value == True)

Merge branch '102-transmitting-error-message-fails' of gitlab.aip.de:yfournier/myplotlib into 102-transmitting-error-message-fails

                  cast all e.args to string where printted.

                                             add a WARNING in case the Error message
                                                 has a <success Flag> (Status.value == True)

Resolve "[BUG]: de_sync_fig failing: ID is not string"

Closes #101

See merge request !69

in mpl_server.py: get_fig_by_id(): fig_id -> str(fig_id)

Resolve "[BUG]: de_sync_fig failing: ID is not string"

See merge request !67

in mpl_server.py: get_fig_by_id(): fig_id -> str(fig_id)

in mpl_fig.py: refresh(): add as_seen keyword alike in print_to_file (prevent the call of fig.plot())

Now print_in_notebook should work

add print_in_notebook function

I am afraid that the as_seen feature won't work since
it seems that they call fig.plot before rendering...
I need to dig more.

in mpl_client.py: in read_data(): add a test to check that the io_function is a String and not a function object.
                                  The problem with function objects is that it may be a security issue. The server
	                          has a limited allowed functions (known_functions).
                                  If io_function is not a string, a WARNING is thrown and io_function
				  is replaced with io_function.__name__.