Merge branch 'rs-update-haml-rails' into 'master'

Update haml-rails to ~> 0.9.0

Closes #2804 

See merge request !1535

Gemfile

@@ -80,7 +80,7 @@ gem 'enumerize', '~> 0.7.0'
 gem "kaminari", "~> 0.16.3"
 
 # HAML
-gem "haml-rails", '~> 0.5.3'
+gem "haml-rails", '~> 0.9.0'
 
 # Files attachments
 gem "carrierwave", '~> 0.9.0'

Gemfile.lock

@@ -330,10 +330,11 @@ GEM
       rspec (>= 2.14, < 4.0)
     haml (4.0.7)
       tilt
-    haml-rails (0.5.3)
+    haml-rails (0.9.0)
       actionpack (>= 4.0.1)
       activesupport (>= 4.0.1)
-      haml (>= 3.1, < 5.0)
+      haml (>= 4.0.6, < 5.0)
+      html2haml (>= 1.0.1)
       railties (>= 4.0.1)
     hashie (2.1.2)
     highline (1.6.21)
@@ -345,6 +346,11 @@ GEM
     html-pipeline (1.11.0)
       activesupport (>= 2)
       nokogiri (~> 1.4)
+    html2haml (2.0.0)
+      erubis (~> 2.7.0)
+      haml (~> 4.0.0)
+      nokogiri (~> 1.6.0)
+      ruby_parser (~> 3.5)
     http-cookie (1.0.2)
       domain_name (~> 0.5)
     http_parser.rb (0.5.3)
@@ -845,7 +851,7 @@ DEPENDENCIES
   grape-entity (~> 0.4.2)
   growl
   guard-rspec (~> 4.2.0)
-  haml-rails (~> 0.5.3)
+  haml-rails (~> 0.9.0)
   hipchat (~> 1.5.0)
   html-pipeline (~> 1.11.0)
   httparty (~> 0.13.3)