localize 404 page; allow Markdown at more places; clickable feature icons (#184)

* allow Markdown in clients (sub)title

* localize 404 page

* add Markdown support for recent posts title

* allow Markdown in see_more section strings

* allow Markdown in features names

* make feature icons clickable (hyperlinks)

* allow Markdown in credits strings; better bootstrapious link

* make see_more section more flexible:

avoid Hugo error(s) when `params.see_more.link_url` or `params.see_more.link_text` aren't defined

* rename `link` key into `url` to be consistent:

- since in the client YAML files the respective key is names `url`, I guess
  I should stick to that.

- besides I've removed the one `#` I've specified as the URL in
  `data/features/webdesign.yaml`; originally that was intended as a "visual"
  hint that now it is easily possible to make the features clickable. but I
  guess that's not really necessary, if not even irritating.

* layouts: remove double logo from 404

the changes in this commit are identical with timmn's commit 33ad328776eeb90f6d6793f7036fcb3338fb5155

* rename string  to

* translate remaining Catalan 404 strings

* improve documentation of feature YAML files

6 files changed, 6 insertions, 0 deletions

diff --git a/exampleSite/data/features/consulting.yaml b/exampleSite/data/features/consulting.yaml
index cece32f..4284222 100644
--- a/exampleSite/data/features/consulting.yaml
+++ b/exampleSite/data/features/consulting.yaml
@@ -1,4 +1,5 @@
 weight: 4
 name: "Consulting"
 icon: "fas fa-lightbulb"
+url: ""
 description: "Fifth abundantly made Give sixth hath. Cattle creature i be don't them behold green moved fowl Moved life us beast good yielding. Have bring."
diff --git a/exampleSite/data/features/email.yaml b/exampleSite/data/features/email.yaml
index bb55f37..42c6499 100644
--- a/exampleSite/data/features/email.yaml
+++ b/exampleSite/data/features/email.yaml
@@ -1,4 +1,5 @@
 weight: 5
 name: "Email Marketing"
 icon: "far fa-envelope"
+url: ""
 description: "Advantage old had otherwise sincerity dependent additions. It in adapted natural hastily is justice. Six draw you him full not mean evil."
diff --git a/exampleSite/data/features/print.yaml b/exampleSite/data/features/print.yaml
index 842c6f4..6362fa3 100644
--- a/exampleSite/data/features/print.yaml
+++ b/exampleSite/data/features/print.yaml
@@ -1,4 +1,5 @@
 weight: 2
 name: "Print"
 icon: "fas fa-print"
+url: ""
 description: "Advantage old had otherwise sincerity dependent additions. It in adapted natural hastily is justice. Six draw you him full not mean evil."
diff --git a/exampleSite/data/features/seo.yaml b/exampleSite/data/features/seo.yaml
index 924a7f0..29af3d3 100644
--- a/exampleSite/data/features/seo.yaml
+++ b/exampleSite/data/features/seo.yaml
@@ -1,4 +1,5 @@
 weight: 3
 name: "SEO and SEM"
 icon: "fas fa-globe"
+url: ""
 description: "Am terminated it excellence invitation projection as. She graceful shy believed distance use nay. Lively is people so basket ladies window expect."
diff --git a/exampleSite/data/features/uiux.yaml b/exampleSite/data/features/uiux.yaml
index fd40682..0533859 100644
--- a/exampleSite/data/features/uiux.yaml
+++ b/exampleSite/data/features/uiux.yaml
@@ -1,4 +1,5 @@
 weight: 6
 name: "UI/UX"
 icon: "fas fa-user"
+url: ""
 description: "Am terminated it excellence invitation projection as. She graceful shy believed distance use nay. Lively is people so basket ladies window expect."
diff --git a/exampleSite/data/features/webdesign.yaml b/exampleSite/data/features/webdesign.yaml
index 0ec993d..0731ce8 100644
--- a/exampleSite/data/features/webdesign.yaml
+++ b/exampleSite/data/features/webdesign.yaml
@@ -1,4 +1,5 @@
 weight: 1
 name: "Webdesign"
 icon: "fas fa-desktop"
+url: ""
 description: "Fifth abundantly made Give sixth hath. Cattle creature i be don't them behold green moved fowl Moved life us beast good yielding. Have bring."