CORS and Polish lang (#126)

I propose adding `crossorigin=anonymous`  for signed stylesheets to allow for CORS policy. 

Practical example - I keep my web page in S3 bucket and redirect both naked domain and www domain into the same bucket (this is rare scenario - most people duplicate buckets). 

So I had to enable CORS like in [this article](https://medium.com/@Keithweaver_/only-allowing-access-to-your-s3-bucket-via-your-website-5ca5c8546152) However CORS cannot be used without crossorigin=anonymous set. (explained [here](https://stackoverflow.com/questions/32039568/what-are-the-integrity-and-crossorigin-attributes)

Also added pl.toml for Polish language.

i18n/pl.toml

@@ -0,0 +1,25 @@
+[404_title]
+    other = "404"
+[404_description]
+    other = "Oops! Ta strona nie istnieje! Albo trafiłeś na błąd {{ with .Site.Params.email }} (w takim wypadku, [powiadom mnie](mailto:{{ . }}) ) {{ end }} albo próbujesz wejść na stronę, której nie ma."
+[index_projects_allProjects]
+    other = "Wszystkie projekty"
+[index_blog_latestPosts]
+    other = "Ostatnie posty"
+[index_blog_allPosts]
+    other = "Wszystkie posty"
+[index_blog_readMore]
+    other = "Więcej"
+[index_currentTime]
+    other = "Mój lokalny czas to"
+[nav_backToSection]
+    other = "Wróć do {{ .Title }}"
+[nav_main]
+    other = "główna"
+[blog_readingTime]
+    one = "{{ .Count }} minut"
+    other = "{{ .Count }} minut"
+[blog_shareThis]
+    other = "Podziel się"
+[footer_text]
+    other = "[**Introduction**](https://github.com/vickylai/hugo-theme-introduction/) szablon dla [Hugo](http://gohugo.io/). Stworzony z [<i class=\"fa fa-heart\"></i> i <i class=\"fa fa-coffee\"></i>](https://vickylai.com) przez społeczność open source."

layouts/partials/css/owlCarousel.html

@@ -1,4 +1,4 @@
 {{ $owlCarousel := resources.Get "vendor/owlCarousel/owl.carousel.min.css" }}
 {{ $owlCarouselTheme := resources.Get "vendor/owlCarousel/owl.theme.default.min.css" }}
 {{ $owlCarouselBundle := slice $owlCarousel $owlCarouselTheme | resources.Concat "/styles/owlCarousel.min.css" | fingerprint }}
-<link rel="stylesheet" href="{{ $owlCarouselBundle.Permalink }}" integrity="{{ $owlCarouselBundle.Data.Integrity }}" media="screen">
+<link rel="stylesheet" href="{{ $owlCarouselBundle.Permalink }}" integrity="{{ $owlCarouselBundle.Data.Integrity }}" crossorigin="anonymous" media="screen">

layouts/partials/head/css.html

@@ -8,11 +8,11 @@
 {{ $cssOpts := (dict "targetPath" "/css/main.css" ) }}
 {{ $postCSSOpts := (dict "use" "autoprefixer" ) }}
 {{ $bundle := $bundleRaw | toCSS $cssOpts | postCSS $postCSSOpts | minify | fingerprint }}
-<link rel="stylesheet" href="{{ $bundle.Permalink }}" integrity="{{ $bundle.Data.Integrity }}" media="screen">
+<link rel="stylesheet" href="{{ $bundle.Permalink }}" integrity="{{ $bundle.Data.Integrity }}" crossorigin="anonymous" media="screen">
 {{ end }}
 
 <!-- Custom css -->
 {{ range .Site.Params.customCSS -}}
     {{ $style := resources.Get . }}
-    <link rel="stylesheet" href="{{ $style.Permalink }}" integrity="{{ $style.Data.Integrity }}" media="screen">
+    <link rel="stylesheet" href="{{ $style.Permalink }}" integrity="{{ $style.Data.Integrity }}" crossorigin="anonymous" media="screen">
 {{- end }}