[IMP] Replace old style parser by TransientModel

The goal is to improve the modularity by making the parser a true inheritable odoo model and share part of the code with the 'report' model

Conflicts:
	report_py3o/models/ir_actions_report_xml.py
	report_py3o/models/py3o_report.py
	report_py3o/tests/test_report_py3o.py

report_py3o/models/__init__.py

@@ -1,3 +1,4 @@
 from . import ir_actions_report_xml
 from . import py3o_template
 from . import py3o_server
+from . import py3o_report