Merge branch 'add-recaptcha-support' into 'master'

Add support for Google reCAPTCHA in user registration to prevent spammers

To do:

- [x] Failing reCAPTCHA test causes all the fields to be lost
- ~~[ ] Improve styling of reCAPTCHA box~~ (not possible)
- ~~[ ] Put settings in `application_settings` (?)~~

![image](/uploads/d38ca89820d3c0066fb8aeb645fd77f0/image.png)

![image](/uploads/6b050749963691b023d076682abcf736/image.png)

Page when you fail CAPTCHA:

![image](/uploads/bc4846f0a5144985bc41dfa75eeab4c1/image.png)


See merge request !2216

1 files changed, 3 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index cdf8884da91..7c3a0ca016f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -35,6 +35,9 @@ gem 'omniauth-twitter',       '~> 1.2.0'
 gem 'omniauth_crowd'
 gem 'rack-oauth2',            '~> 1.2.1'
 
+# reCAPTCHA protection
+gem 'recaptcha', require: 'recaptcha/rails'
+
 # Two-factor authentication
 gem 'devise-two-factor', '~> 2.0.0'
 gem 'rqrcode-rails3', '~> 0.1.7'