[IMP]: bugfixing and code cleaning in project and project_* modules

addons/project/__init__.py

addons/project/__openerp__.py

addons/project/board_project_demo.xml

addons/project/board_project_view.xml

addons/project/installer.py

addons/project/project.py

addons/project/project_data.xml

addons/project/project_demo.xml

addons/project/project_installer.xml

addons/project/project_mailgate.py

addons/project/project_resource.py

addons/project/project_view.xml

addons/project/project_wizard.xml

addons/project/report/__init__.py

addons/project/report/project_report.py

addons/project/report/project_report_view.xml

addons/project/res_partner.py

addons/project/res_partner_view.xml

addons/project/wizard/project_close_task.py

addons/project/wizard/project_close_task_view.xml