Merge pull request #113 from babs/code-refactoring-trans-fr

Updated fr_FR translations
Introduced a "New object" submenu when activating the popup menu over a
schema.

Minor fixes when selecting graphical objects on model.
Object selection improvements. Now the user can select the object and
activate the context menu with a single right-click.
Some field semantics adjustments on relationship editing form.

Fixed some bugs that was causing crashes when removing all operations
from operation list.
Version upgrade 0.4.0-rc -> 0.4.0-rc1
Windows installer script updated.
Updated fr_FR translation