Add basic OHSU styling

This commit adds OHSU colors, fonts, and the favicon. A
view override from Hyrax 2.0.0 is included to change the
logo.

The variables sass file overrides Bootstrap 3 SASS variables.

Closes #231

app/assets/stylesheets/hyrax.scss

@@ -2,8 +2,8 @@
  *= require jquery-ui
  *= require select2
  *= require_self
-*/
-
+ */
+@import "mahonia/variables";
 @import "bootstrap-sprockets";
 @import 'bootstrap';
 @import 'blacklight/blacklight';

app/assets/stylesheets/mahonia.scss

@@ -1 +1,4 @@
 @import 'mahonia/search_fields';
+@import 'mahonia/footer';
+@import 'mahonia/header';
+@import 'mahonia/buttons';

app/assets/stylesheets/mahonia/_buttons.scss

@@ -0,0 +1,9 @@
+@import 'variables';
+
+.btn-primary {
+  background-image: linear-gradient(to bottom, $btn-primary-gradient-start, $btn-primary-gradient-end);
+}
+
+.btn-primary:hover {
+  background-image: linear-gradient(to bottom, $btn-primary-gradient-end, $btn-primary-gradient-start);
+}

app/assets/stylesheets/mahonia/_footer.scss

@@ -0,0 +1,9 @@
+@import 'variables';
+
+.navbar.navbar-inverse.site-footer {
+  background: $ohsu-navbar;
+  color: $ohsu-navbar-text;
+  .navbar-text {
+    color: $ohsu-navbar-text;
+  }
+}

app/assets/stylesheets/mahonia/_header.scss

@@ -0,0 +1,56 @@
+@import 'variables';
+
+// Logo container
+.navbar-brand {
+  margin-top: 1.35em;
+}
+
+// Logo text
+.institution_name {
+  color: $ohsu-navbar;
+  font-size: 2em;
+  font-weight: 300;
+}
+
+// user_util_links -- the English and Login buttons in the header
+.navbar-nav.navbar-right
+ {
+  margin-top: 1.7em;
+  margin-right: 1em;
+  li {
+    a { 
+      color: $ohsu-link;
+    }
+    a:hover { 
+      color: $ohsu-link-hover;
+    }
+  }
+}
+
+// Top navbar that contains the user_util_links 
+.navbar-inverse.navbar-static-top {
+  min-height:100px;
+  border: 0;
+  background: $ohsu-navbar-header-background;
+  border: 0;
+}
+
+// Navbar that contains the search bar
+.navbar-default.navbar-static-top
+{
+  background: $ohsu-navbar;
+  color: $ohsu-navbar-text;
+  border: 0;
+}
+
+// Navbar links
+.navbar-default .navbar-nav {
+  li {
+    a {
+      color: $ohsu-navbar-text;
+    }
+    a:hover {
+      color: $ohsu-navbar-text-hover;
+    }
+  }
+}

app/assets/stylesheets/mahonia/_navbar.scss

@@ -0,0 +1,5 @@
+@import 'colors';
+
+#masthead.navbar-inverse {
+  background-color: $ohsu-blue;
+}

app/assets/stylesheets/mahonia/_variables.scss

@@ -0,0 +1,52 @@
+//== OHSU Custom Colors
+$ohsu-link: #0072FF;
+$ohsu-link-hover: #0E4D8F;
+$ohsu-body-text: #555555;
+$ohsu-alert: #C34D36;
+
+$ohsu-navbar: #0e4d8f;
+$ohsu-navbar-header-background: #fff;
+$ohsu-navbar-text: #fff;
+$ohsu-navbar-text-hover: #eee;
+// OHSU uses this font for online identity
+@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400');
+
+//== Bootstrap overrides
+// Follows this structure: https://github.com/twbs/bootstrap-sass/blob/master/assets/stylesheets/bootstrap/_variables.scss
+
+//== Colors
+$brand-primary: #0072FF;
+
+//== Scaffolding
+$text-color: $ohsu-body-text;
+
+//== Typography
+$font-family-sans-serif: "Source Sans Pro", "Helvetica Neue", Helvetica, Arial, sans-serif !default;
+
+
+//== Buttons
+//
+//## For each of Bootstrap's buttons, define text, background and border color.
+
+
+$btn-primary-color:              #805b16;
+$btn-primary-bg:                 #ffd769;
+$btn-primary-border:             #edb519;
+
+$btn-primary-gradient-start:     $btn-primary-bg;
+$btn-primary-gradient-end:       #ffc529;
+
+$btn-info-color:                 $btn-primary-color;
+$btn-info-bg:                    $btn-primary-bg;
+$btn-info-border:                $btn-primary-border;
+
+// Allows for customizing button radius independently from global border radius
+$btn-border-radius-base:         25px;
+$btn-border-radius-large:        25px;
+$btn-border-radius-small:        25px;
+
+
+//** Global textual link color.
+$link-color: $ohsu-link;
+//** Link hover color set via `darken()` function.
+$link-hover-color: $ohsu-link-hover;

app/views/_logo.html.erb

@@ -0,0 +1,3 @@
+<a id="logo" class="navbar-brand" href="<%= hyrax.root_path %>" data-no-turbolink="true">
+  <span class="institution_name"><%= application_name %></span>
+</a>

app/views/shared/_appearance_styles.html.erb

@@ -0,0 +1 @@
+<% # Override this partial from Hyrax. You won't be able to change styles from the UI. %>