Navbar (#31)

* started workin on 'navbar' module

* changed bootstrap theme to bootswatch/Simplex

* big work on navbar logic

* starting creating menus using navbar

* converted app views to new Wepage decorator, updated navbar

* reimplemented DernieresMaraudes as a dropdown instead of ContextMixin

* reorganised static files, minor code cleanups

* turned Link.href into lazy-evaluated property

* collapsed 'navbar' module into 'website', dynamic building of ApplicationMenu subclasses

* minor cleanup

* blah blah blah

* added way to add admin/non-admin links

* minor style change : red border for active page instead of all dropdowns

* deleted file

* prepare adding removing menu templates files, being replaced by code

* essayé de généraliser le code pour les modaux bootstrap, non testé git status

* more preparation and thinking on navbar app_menus logic...

* added LinkManager and DropdownManager, getting closer...

* small fix in DropdownManager.__get__

* boosted up work: keep it simple so it can be merged fast, major layout changes

* added month filter on maraudes:liste

* added 'as_icon' filter to display boolean/null values as bootstrap icons

* remove inactive user from planning selection

* removed all unused 'menu' templates

* set up django_select2 to use static files

* small fix after review

website/static/css/base.css

@@ -0,0 +1,32 @@
+
+.navbar-fixed-side .navbar-nav>li>a {
+  border-bottom: none;
+  font-variant: small-caps;
+  color: #fff;
+}
+
+#menu {
+  border: none;
+  border-right: 4px solid #980300;
+  background-color: #121212;
+}
+
+@media (max-width:768px){
+  #menu { border: none; }
+}
+
+.app-menu {
+  background-color: #121212;
+  border: none;
+}
+
+
+.active{
+  border-right: 2px solid #980300 !important;
+}
+
+.dropdown-menu {
+  border-bottom: none !important;
+}
+
+