Merge remote-tracking branch 'pr/237' into develop

Twitter Feature on Main-View from @loadtocode

Twitter feature within home/index of LEAP web app as feed of tweets of one user's twitter account

How to use it: set up an Application-only authentication by twitter (https://dev.twitter.com/oauth/application-only) and then create a config/secrets.yml including:
```
development:
  twitter:
    enabled: false # set to true for usage
    twitter_handle: XXXXX #put your twitter handle here
    bearer_token: XXXXX #put your bearer token here
test:
  twitter:
    enabled: false # set to true for usage
    twitter_handle: XXXXX #put your twitter handle here
    bearer_token: XXXXX #put your bearer token here
```

things in the PR:

- [x] gemfile:twitter
- [x] twitter helper (caching (to avoid reaching twitter rate limits)
- [x] index twitter view
- [x] twitter css (twitter design as discussed in call: Profil-Header: Picture, Link to twitter + twitter_handle; removed picture and twitter_handle from individual tweet, heading aligns at the top, only the last 3 tweets are shown)
- [x] script to generate bearer token
- [x] script to invalidate generated bearer token
- [x] documentation (Readme + Doc)

1 files changed, 26 insertions, 0 deletions

diff --git a/app/views/twitter/_index.html.erb b/app/views/twitter/_index.html.erb
new file mode 100644
index 0000000..a7ebd1b
--- /dev/null
+++ b/app/views/twitter/_index.html.erb
@@ -0,0 +1,26 @@
+<% if twitter_enabled == true %>
+  <div class="twitter">
+
+      <div class="twitter_header">
+        <div class="twitter_id">
+          <div class="twitter_image_frame"><%= image_tag("Twitter_Logo_Blue.png") %></div>
+          <div class="twitter_name"><%= twitter_name%><br><a href="https://twitter.com/loadtocode">@<%= twitter_handle %></a></div>
+        </div>
+      </div>
+
+      <div class="twitter_list">
+        <% tweets.each do |e| %>
+          <div class="tweet">
+            <div class="tweet_text"><%= " #{e.text}" %>
+            </div>
+            <div class="tweet_text_date">tweeted on <% t = e.created_at%> <%= t.strftime("%m/%d/%y").to_s %>
+            </div>
+          </div>
+        <% end %>
+    </div>
+
+    <div class="twitter_footer">
+      <p>This feed uses a Ruby interface to access the Twitter API. Within LEAP Twitter does not track you.</p>
+    </div>
+</div>
+<% end %>