Warning, may contains some bugs !!!

- updated scripts etc
- make tests pass

Add the lodelsites directory to the autotools chain. Note : for the moment it's a dirty POC, we have to do it in a cleaner way...

README is now present in $(datadir)/doc/lodel2/
And as README.gz in /usr/share/doc/lodel2/ for debian packages

with make deb . Next commit will update the README

Remove duplicate install templates directories (the same directories can be used by SLIM & runtest)
Addapted runtest so it can fetch the install template from the lodel2 datadir
Make lodel_admin.py runnable (add the python3 shebang + chmod +x at install-data target)
And a beautifull ASCII formating for the README

Now we can run tests from the tarball generated by make dist

SLIM is now able to edit configuration from CLI, to start instances etc.

Now when running distclean ALL files generated by the ./bootstrap && ./configure && make are deleted.
Maybe it's not a good idea because it's not the purpose of distclean target...

IMPORTANT : tests are broken. See details below

A new lodel/buildconf.py.ini file created. It will be transformed to a lodel/buildconf.py file by ./configure .
This file goal is to store build time constant (for the moment the presence of pymongo).
You have to build lodel2 before being able to run the tests.

- create_instance.sh create some symbolic links
- webui plugin that add webui configuration variable

Now a backreference is represented by a tuple(LeObject child class, fieldname)

Adding images support for doxygen documentation ( in doc/img ) + automated images generation with graphviz & make