Add autoprefixer to Grunt tasks.

services/web/Gruntfile.coffee

@@ -1,5 +1,6 @@
 fs = require "fs"
 PackageVersions = require "./app/coffee/infrastructure/PackageVersions"
+require('es6-promise').polyfill()
 
 module.exports = (grunt) ->
 	grunt.loadNpmTasks 'grunt-contrib-coffee'
@@ -18,6 +19,7 @@ module.exports = (grunt) ->
 	grunt.loadNpmTasks 'grunt-contrib-watch'
 	grunt.loadNpmTasks 'grunt-parallel'
 	grunt.loadNpmTasks 'grunt-exec'
+	grunt.loadNpmTasks 'grunt-postcss'
 	# grunt.loadNpmTasks 'grunt-contrib-imagemin'
 	# grunt.loadNpmTasks 'grunt-sprity'
 
@@ -136,8 +138,14 @@ module.exports = (grunt) ->
 				files:
 					"public/stylesheets/style.css": "public/stylesheets/style.less"
 
-
-
+		postcss:
+			options:
+				map: true,
+				processors: [
+					require('autoprefixer')({browsers: [ 'last 2 versions', 'ie >= 10' ]})
+				]
+			dist:
+				src: 'public/stylesheets/style.css'
 
 		env:
 			run:
@@ -366,7 +374,7 @@ module.exports = (grunt) ->
 	
 	grunt.registerTask 'compile:server', 'Compile the server side coffee script', ['clean:app', 'coffee:app', 'coffee:app_dir', 'compile:modules:server']
 	grunt.registerTask 'compile:client', 'Compile the client side coffee script', ['coffee:client', 'coffee:sharejs', 'wrap_sharejs', "compile:modules:client", 'compile:modules:inject_clientside_includes']
-	grunt.registerTask 'compile:css', 'Compile the less files to css', ['less']
+	grunt.registerTask 'compile:css', 'Compile the less files to css', ['less', 'postcss:dist']
 	grunt.registerTask 'compile:minify', 'Concat and minify the client side js', ['requirejs', "file_append", "exec:cssmin",]
 	grunt.registerTask 'compile:unit_tests', 'Compile the unit tests', ['clean:unit_tests', 'coffee:unit_tests']
 	grunt.registerTask 'compile:acceptance_tests', 'Compile the acceptance tests', ['clean:acceptance_tests', 'coffee:acceptance_tests']

services/web/package.json

@@ -67,10 +67,12 @@
     "passport-saml": "^0.15.0"
   },
   "devDependencies": {
+    "autoprefixer": "^6.6.1",
     "bunyan": "0.22.1",
-    "translations-sharelatex": "git+https://github.com/sharelatex/translations-sharelatex.git#master",
     "chai": "",
     "chai-spies": "",
+    "clean-css": "^3.4.18",
+    "es6-promise": "^4.0.5",
     "grunt-available-tasks": "0.4.1",
     "grunt-bunyan": "0.5.0",
     "grunt-contrib-clean": "0.5.0",
@@ -79,7 +81,6 @@
     "grunt-contrib-requirejs": "0.4.1",
     "grunt-contrib-watch": "^1.0.0",
     "grunt-env": "0.4.4",
-    "clean-css": "^3.4.18",
     "grunt-exec": "^0.4.7",
     "grunt-execute": "^0.2.2",
     "grunt-file-append": "0.0.6",
@@ -87,9 +88,11 @@
     "grunt-mocha-test": "0.9.0",
     "grunt-newer": "^1.2.0",
     "grunt-parallel": "^0.5.1",
+    "grunt-postcss": "^0.8.0",
     "grunt-sed": "^0.1.1",
     "sandboxed-module": "0.2.0",
     "sinon": "",
-    "timekeeper": ""
+    "timekeeper": "",
+    "translations-sharelatex": "git+https://github.com/sharelatex/translations-sharelatex.git#master"
   }
 }