some proposal modifications
Merge branch 'version_1_9' into version_2_0

Conflicts:
	app/views/proposals/edit.html.erb
Merge branch 'version_1_9' into version_2_0
Merge branch 'version_1_9' into version_2_0
ff
Merge branch 'version_1_9' into version_2_0
Merge branch 'version_1_9' into version_2_0
now you can see contributes while you edit the proposal
Merge branch 'version_1_9' into version_2_0
Merge branch 'version_1_9' into version_2_0
Merge branch 'version_1_9' into version_2_0

Conflicts:
	app/views/proposals/_comment.html.erb
contributes integration
some fixes in proposal editing
many bugfixes and little graphic improvements
fix for blogs code injection
fixed seeds
some fizes on 2.0
new mail layout
some resource loading improvements, css, and homepage caching
contribute integration