Starts using invisible_captcha in the source code. Pending: tests, proper invisible_captcha gem in Gemfile

Gemfile.lock

@@ -7,6 +7,14 @@ GIT
       coffee-rails
       sass-rails
 
+GIT
+  remote: https://github.com/kikito/invisible_captcha
+  revision: b5c6ebe4cfaa029012de7279314ce26709d80199
+  branch: timestamp_in_session
+  specs:
+    invisible_captcha (0.8.1)
+      rails
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -202,8 +210,6 @@ GEM
       terminal-table (>= 1.5.1)
     initialjs-rails (0.2.0.1)
       railties (>= 3.1, < 5.0)
-    invisible_captcha (0.8.1)
-      rails
     jquery-rails (4.1.1)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
@@ -469,7 +475,7 @@ DEPENDENCIES
   groupdate
   i18n-tasks
   initialjs-rails (= 0.2.0.1)
-  invisible_captcha
+  invisible_captcha!
   jquery-rails
   jquery-ui-rails
   kaminari