Header tweaks (#109)

* better mechanism for header images
* add new use cases photo

_src/_assets/styles/_page-community.scss

@@ -5,7 +5,6 @@
 //
 .page-community {
     .header {
-        background-image: url('../img/photo2.jpg');
         background-position: center top;
     }
 }

_src/_assets/styles/_page-whitepaper.scss

@@ -1,8 +1,5 @@
 
 .page-whitepaper {
-    .header {
-        background-image: url('/assets/img/photo3.jpg');
-    }
     .content--page--markdown {
         > p:nth-child(1),
         > p:nth-child(2),

_src/_layouts/page.html

@@ -2,7 +2,7 @@
 layout: base
 ---
 
-<header role="banner" class="header">
+<header role="banner" class="header" {% if page.image %}style="background-image:url('/assets/img/{{ page.image }}')"{% endif %}>
 
     {% include menu-main.html %}
 

_src/community.html

@@ -4,6 +4,8 @@ layout: page
 title: Community
 description: 'There are many ways you can contribute to the BigchainDB project, some very easy and others more involved.'
 
+image: photo2.jpg
+
 js: page-community.min.js
 quotes: set3
 ---

_src/index.html

@@ -4,7 +4,6 @@ layout: base
 tagline:    'Meet BigchainDB. <br>The scalable blockchain database.'
 
 front_page: true
-hero_video_name: northern-light
 quotes: set1
 
 js: page-front.min.js

_src/usecases.html

@@ -4,6 +4,8 @@ layout: page
 title: Use Cases
 description: For blockchain technology to go mainstream, it needs scale. At BigchainDB, we’ve taken care of that for you.
 
+image: photo4.jpg
+
 intro:
     title: Where blockchains and databases meet
     description: "BigchainDB is for developers and organizations looking for a scalable, queryable database with blockchain characteristics such as decentralization, immutability and the ability to treat anything stored in the database as an asset. Whether it’s atoms, bits or bytes of value, any real-world blockchain application needs scale and performance. A perfect fit for BigchainDB."

_src/whitepaper/index.md

@@ -4,6 +4,8 @@ layout: page
 title: Whitepaper
 description: 'This paper describes BigchainDB. BigchainDB fills a gap in the decentralization ecosystem: a decentralized database, at scale. It is capable of 1 million writes per second throughput, storing petabytes of data, and sub-second latency.'
 
+image: photo3.jpg
+
 whitepaper:
     title: Full Whitepaper
     text: Download the full whitepaper.